* [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
@ 2018-09-10 10:06 Ruiyu Ni
2018-09-10 11:37 ` Yao, Jiewen
2018-09-10 16:38 ` Kinney, Michael D
0 siblings, 2 replies; 11+ messages in thread
From: Ruiyu Ni @ 2018-09-10 10:06 UTC (permalink / raw)
To: edk2-devel; +Cc: Jiewen Yao, Liming Gao, Michael D Kinney
Today's InterlockedIncrement()/InterlockedDecrement() guarantees to
perform atomic increment/decrement but doesn't guarantee the return
value equals to the new value.
The patch fixes the behavior to use "XADD" instruction to guarantee
the return value equals to the new value.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
---
MdePkg/Include/Library/SynchronizationLib.h | 6 +--
.../BaseSynchronizationLib.inf | 18 ++++-----
.../BaseSynchronizationLibInternals.h | 6 +--
.../BaseSynchronizationLib/Ia32/GccInline.c | 18 ++++-----
.../Ia32/InterlockedDecrement.c | 42 --------------------
.../Ia32/InterlockedDecrement.nasm | 10 ++---
.../Ia32/InterlockedIncrement.c | 43 --------------------
.../Ia32/InterlockedIncrement.nasm | 7 ++--
.../BaseSynchronizationLib/Synchronization.c | 6 +--
.../BaseSynchronizationLib/SynchronizationGcc.c | 6 +--
.../BaseSynchronizationLib/SynchronizationMsc.c | 6 +--
.../Library/BaseSynchronizationLib/X64/GccInline.c | 19 +++++----
.../X64/InterlockedDecrement.c | 46 ----------------------
.../X64/InterlockedDecrement.nasm | 8 ++--
.../X64/InterlockedIncrement.c | 46 ----------------------
.../X64/InterlockedIncrement.nasm | 5 ++-
16 files changed, 52 insertions(+), 240 deletions(-)
delete mode 100644 MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
delete mode 100644 MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
delete mode 100644 MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
delete mode 100644 MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
diff --git a/MdePkg/Include/Library/SynchronizationLib.h b/MdePkg/Include/Library/SynchronizationLib.h
index da69f6ff5e..ce3bce04f5 100644
--- a/MdePkg/Include/Library/SynchronizationLib.h
+++ b/MdePkg/Include/Library/SynchronizationLib.h
@@ -144,8 +144,7 @@ ReleaseSpinLock (
Performs an atomic increment of the 32-bit unsigned integer specified by
Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
@@ -166,8 +165,7 @@ InterlockedIncrement (
Performs an atomic decrement of the 32-bit unsigned integer specified by
Value and returns the decremented value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
diff --git a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
index 0be1d4331f..b971cd138d 100755
--- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
+++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
@@ -34,9 +34,9 @@ [Sources.IA32]
Ia32/InterlockedCompareExchange64.c | MSFT
Ia32/InterlockedCompareExchange32.c | MSFT
Ia32/InterlockedCompareExchange16.c | MSFT
- Ia32/InterlockedDecrement.c | MSFT
- Ia32/InterlockedIncrement.c | MSFT
- SynchronizationMsc.c | MSFT
+ Ia32/InterlockedDecrement.nasm | MSFT
+ Ia32/InterlockedIncrement.nasm | MSFT
+ SynchronizationMsc.c | MSFT
Ia32/InterlockedCompareExchange64.nasm| INTEL
Ia32/InterlockedCompareExchange32.nasm| INTEL
@@ -54,17 +54,15 @@ [Sources.X64]
X64/InterlockedCompareExchange64.c | MSFT
X64/InterlockedCompareExchange32.c | MSFT
X64/InterlockedCompareExchange16.c | MSFT
+ X64/InterlockedDecrement.nasm | MSFT
+ X64/InterlockedIncrement.nasm | MSFT
+ SynchronizationMsc.c | MSFT
X64/InterlockedCompareExchange64.nasm| INTEL
X64/InterlockedCompareExchange32.nasm| INTEL
X64/InterlockedCompareExchange16.nasm| INTEL
-
- X64/InterlockedDecrement.c | MSFT
- X64/InterlockedIncrement.c | MSFT
- SynchronizationMsc.c | MSFT
-
- X64/InterlockedDecrement.nasm| INTEL
- X64/InterlockedIncrement.nasm| INTEL
+ X64/InterlockedDecrement.nasm | INTEL
+ X64/InterlockedIncrement.nasm | INTEL
Synchronization.c | INTEL
Ia32/InternalGetSpinLockProperties.c | GCC
diff --git a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.h b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.h
index 37edd7c188..8c363a8585 100644
--- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.h
+++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.h
@@ -27,8 +27,7 @@
Performs an atomic increment of the 32-bit unsigned integer specified by
Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
@param Value A pointer to the 32-bit value to increment.
@@ -47,8 +46,7 @@ InternalSyncIncrement (
Performs an atomic decrement of the 32-bit unsigned integer specified by
Value and returns the decrement value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
@param Value A pointer to the 32-bit value to decrement.
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
index 4ab293f243..d82e0205f5 100644
--- a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
+++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
@@ -20,8 +20,7 @@
Performs an atomic increment of the 32-bit unsigned integer specified by
Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
@param Value A pointer to the 32-bit value to increment.
@@ -37,9 +36,10 @@ InternalSyncIncrement (
UINT32 Result;
__asm__ __volatile__ (
+ "movl $1, %%eax \n\t"
"lock \n\t"
- "incl %2 \n\t"
- "movl %2, %%eax "
+ "xadd %%eax, %2 \n\t"
+ "inc %%eax "
: "=a" (Result), // %0
"=m" (*Value) // %1
: "m" (*Value) // %2
@@ -57,8 +57,7 @@ InternalSyncIncrement (
Performs an atomic decrement of the 32-bit unsigned integer specified by
Value and returns the decremented value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
@param Value A pointer to the 32-bit value to decrement.
@@ -74,9 +73,10 @@ InternalSyncDecrement (
UINT32 Result;
__asm__ __volatile__ (
- "lock \n\t"
- "decl %2 \n\t"
- "movl %2, %%eax "
+ "movl $-1, %%eax \n\t"
+ "lock \n\t"
+ "xadd %%eax, %2 \n\t"
+ "dec %%eax "
: "=a" (Result), // %0
"=m" (*Value) // %1
: "m" (*Value) // %2
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
deleted file mode 100644
index 354a0e7ab1..0000000000
--- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
+++ /dev/null
@@ -1,42 +0,0 @@
-/** @file
- InterlockedDecrement function
-
- Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php.
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-
-
-
-/**
- Performs an atomic decrement of an 32-bit unsigned integer.
-
- Performs an atomic decrement of the 32-bit unsigned integer specified by
- Value and returns the decrement value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
-
- @param Value A pointer to the 32-bit value to decrement.
-
- @return The decrement value.
-
-**/
-UINT32
-EFIAPI
-InternalSyncDecrement (
- IN volatile UINT32 *Value
- )
-{
- _asm {
- mov eax, Value
- lock dec dword ptr [eax]
- mov eax, [eax]
- }
-}
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nasm b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nasm
index 4c46041186..dd5a8de3ed 100644
--- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nasm
+++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nasm
@@ -1,6 +1,6 @@
;------------------------------------------------------------------------------
;
-; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
@@ -32,8 +32,8 @@
;------------------------------------------------------------------------------
global ASM_PFX(InternalSyncDecrement)
ASM_PFX(InternalSyncDecrement):
- mov eax, [esp + 4]
- lock dec dword [eax]
- mov eax, [eax]
+ mov ecx, [esp + 4]
+ mov eax, 0FFFFFFFFh
+ lock xadd dword [ecx], eax
+ dec eax
ret
-
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
deleted file mode 100644
index c61a550119..0000000000
--- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/** @file
- InterLockedIncrement function
-
- Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php.
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-
-
-
-/**
- Performs an atomic increment of an 32-bit unsigned integer.
-
- Performs an atomic increment of the 32-bit unsigned integer specified by
- Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
-
- @param Value A pointer to the 32-bit value to increment.
-
- @return The incremented value.
-
-**/
-UINT32
-EFIAPI
-InternalSyncIncrement (
- IN volatile UINT32 *Value
- )
-{
- _asm {
- mov eax, Value
- lock inc dword ptr [eax]
- mov eax, [eax]
- }
-}
-
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
index 3902c73275..0677e4bf78 100644
--- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
+++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
@@ -32,8 +32,9 @@
;------------------------------------------------------------------------------
global ASM_PFX(InternalSyncIncrement)
ASM_PFX(InternalSyncIncrement):
- mov eax, [esp + 4]
- lock inc dword [eax]
- mov eax, [eax]
+ mov ecx, [esp + 4]
+ mov eax, 1
+ lock xadd dword [ecx], eax
+ inc eax
ret
diff --git a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
index 76c5a1275c..0ab59ca702 100644
--- a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
+++ b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
@@ -231,8 +231,7 @@ ReleaseSpinLock (
Performs an atomic increment of the 32-bit unsigned integer specified by
Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
@@ -256,8 +255,7 @@ InterlockedIncrement (
Performs an atomic decrement of the 32-bit unsigned integer specified by
Value and returns the decremented value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
index 5ac548b19f..177739d3da 100644
--- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
+++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
@@ -247,8 +247,7 @@ ReleaseSpinLock (
Performs an atomic increment of the 32-bit unsigned integer specified by
Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
@@ -272,8 +271,7 @@ InterlockedIncrement (
Performs an atomic decrement of the 32-bit unsigned integer specified by
Value and returns the decremented value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
index e3298c8ab4..6ab2d71870 100644
--- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
+++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
@@ -249,8 +249,7 @@ ReleaseSpinLock (
Performs an atomic increment of the 32-bit unsigned integer specified by
Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
@@ -274,8 +273,7 @@ InterlockedIncrement (
Performs an atomic decrement of the 32-bit unsigned integer specified by
Value and returns the decremented value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
If Value is NULL, then ASSERT().
diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
index 5224dd063f..4c4d6e3fc7 100644
--- a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
+++ b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
@@ -15,14 +15,12 @@
-
/**
Performs an atomic increment of an 32-bit unsigned integer.
Performs an atomic increment of the 32-bit unsigned integer specified by
Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
@param Value A pointer to the 32-bit value to increment.
@@ -38,9 +36,10 @@ InternalSyncIncrement (
UINT32 Result;
__asm__ __volatile__ (
+ "movl $1, %%eax \n\t"
"lock \n\t"
- "incl %2 \n\t"
- "mov %2, %%eax "
+ "xadd %%eax, %2 \n\t"
+ "inc %%eax "
: "=a" (Result), // %0
"=m" (*Value) // %1
: "m" (*Value) // %2
@@ -57,8 +56,7 @@ InternalSyncIncrement (
Performs an atomic decrement of the 32-bit unsigned integer specified by
Value and returns the decremented value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
+ performed using MP safe mechanisms.
@param Value A pointer to the 32-bit value to decrement.
@@ -74,9 +72,10 @@ InternalSyncDecrement (
UINT32 Result;
__asm__ __volatile__ (
- "lock \n\t"
- "decl %2 \n\t"
- "mov %2, %%eax "
+ "movl $-1, %%eax \n\t"
+ "lock \n\t"
+ "xadd %%eax, %2 \n\t"
+ "dec %%eax "
: "=a" (Result), // %0
"=m" (*Value) // %1
: "m" (*Value) // %2
diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
deleted file mode 100644
index da402cd4c6..0000000000
--- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
+++ /dev/null
@@ -1,46 +0,0 @@
-/** @file
- InterlockedDecrement function
-
- Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php.
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-/**
- Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
-**/
-
-long _InterlockedDecrement(
- long * lpAddend
-);
-
-#pragma intrinsic(_InterlockedDecrement)
-
-/**
- Performs an atomic decrement of an 32-bit unsigned integer.
-
- Performs an atomic decrement of the 32-bit unsigned integer specified by
- Value and returns the decrement value. The decrement operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
-
- @param Value A pointer to the 32-bit value to decrement.
-
- @return The decrement value.
-
-**/
-UINT32
-EFIAPI
-InternalSyncDecrement (
- IN volatile UINT32 *Value
- )
-{
- return _InterlockedDecrement ((long *)(UINTN)(Value));
-}
-
diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
index 60f43111fe..dabdca945e 100644
--- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
+++ b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
@@ -1,6 +1,6 @@
;------------------------------------------------------------------------------
;
-; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
@@ -33,7 +33,7 @@
;------------------------------------------------------------------------------
global ASM_PFX(InternalSyncDecrement)
ASM_PFX(InternalSyncDecrement):
- lock dec dword [rcx]
- mov eax, [rcx]
+ mov eax, 0FFFFFFFFh
+ lock xadd dword [rcx], eax
+ dec eax
ret
-
diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
deleted file mode 100644
index bbd1384602..0000000000
--- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
+++ /dev/null
@@ -1,46 +0,0 @@
-/** @file
- InterLockedIncrement function
-
- Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php.
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-/**
- Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
-**/
-
-long _InterlockedIncrement(
- long * lpAddend
-);
-
-#pragma intrinsic(_InterlockedIncrement)
-
-/**
- Performs an atomic increment of an 32-bit unsigned integer.
-
- Performs an atomic increment of the 32-bit unsigned integer specified by
- Value and returns the incremented value. The increment operation must be
- performed using MP safe mechanisms. The state of the return value is not
- guaranteed to be MP safe.
-
- @param Value A pointer to the 32-bit value to increment.
-
- @return The incremented value.
-
-**/
-UINT32
-EFIAPI
-InternalSyncIncrement (
- IN volatile UINT32 *Value
- )
-{
- return _InterlockedIncrement ((long *)(UINTN)(Value));
-}
-
diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
index 7f877b5774..77379d998e 100644
--- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
+++ b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
@@ -33,7 +33,8 @@
;------------------------------------------------------------------------------
global ASM_PFX(InternalSyncIncrement)
ASM_PFX(InternalSyncIncrement):
- lock inc dword [rcx]
- mov eax, [rcx]
+ mov eax, 1
+ lock xadd dword [rcx], eax
+ inc eax
ret
--
2.16.1.windows.1
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-10 10:06 [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value Ruiyu Ni
@ 2018-09-10 11:37 ` Yao, Jiewen
2018-09-10 14:59 ` Ni, Ruiyu
2018-09-10 16:38 ` Kinney, Michael D
1 sibling, 1 reply; 11+ messages in thread
From: Yao, Jiewen @ 2018-09-10 11:37 UTC (permalink / raw)
To: Ni, Ruiyu, edk2-devel@lists.01.org; +Cc: Gao, Liming, Kinney, Michael D
Hi
Can we use XSUB for decrement?
Thank you
Yao Jiewen
> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Monday, September 10, 2018 6:06 PM
> To: edk2-devel@lists.01.org
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> <liming.gao@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>
> Subject: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement
> return value
>
> Today's InterlockedIncrement()/InterlockedDecrement() guarantees to
> perform atomic increment/decrement but doesn't guarantee the return
> value equals to the new value.
>
> The patch fixes the behavior to use "XADD" instruction to guarantee
> the return value equals to the new value.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> ---
> MdePkg/Include/Library/SynchronizationLib.h | 6 +--
> .../BaseSynchronizationLib.inf | 18 ++++-----
> .../BaseSynchronizationLibInternals.h | 6 +--
> .../BaseSynchronizationLib/Ia32/GccInline.c | 18 ++++-----
> .../Ia32/InterlockedDecrement.c | 42
> --------------------
> .../Ia32/InterlockedDecrement.nasm | 10 ++---
> .../Ia32/InterlockedIncrement.c | 43
> --------------------
> .../Ia32/InterlockedIncrement.nasm | 7 ++--
> .../BaseSynchronizationLib/Synchronization.c | 6 +--
> .../BaseSynchronizationLib/SynchronizationGcc.c | 6 +--
> .../BaseSynchronizationLib/SynchronizationMsc.c | 6 +--
> .../Library/BaseSynchronizationLib/X64/GccInline.c | 19 +++++----
> .../X64/InterlockedDecrement.c | 46
> ----------------------
> .../X64/InterlockedDecrement.nasm | 8 ++--
> .../X64/InterlockedIncrement.c | 46
> ----------------------
> .../X64/InterlockedIncrement.nasm | 5 ++-
> 16 files changed, 52 insertions(+), 240 deletions(-)
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
>
> diff --git a/MdePkg/Include/Library/SynchronizationLib.h
> b/MdePkg/Include/Library/SynchronizationLib.h
> index da69f6ff5e..ce3bce04f5 100644
> --- a/MdePkg/Include/Library/SynchronizationLib.h
> +++ b/MdePkg/Include/Library/SynchronizationLib.h
> @@ -144,8 +144,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned integer specified by
> Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -166,8 +165,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned integer specified
> by
> Value and returns the decremented value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> index 0be1d4331f..b971cd138d 100755
> --- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> +++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> @@ -34,9 +34,9 @@ [Sources.IA32]
> Ia32/InterlockedCompareExchange64.c | MSFT
> Ia32/InterlockedCompareExchange32.c | MSFT
> Ia32/InterlockedCompareExchange16.c | MSFT
> - Ia32/InterlockedDecrement.c | MSFT
> - Ia32/InterlockedIncrement.c | MSFT
> - SynchronizationMsc.c | MSFT
> + Ia32/InterlockedDecrement.nasm | MSFT
> + Ia32/InterlockedIncrement.nasm | MSFT
> + SynchronizationMsc.c | MSFT
>
> Ia32/InterlockedCompareExchange64.nasm| INTEL
> Ia32/InterlockedCompareExchange32.nasm| INTEL
> @@ -54,17 +54,15 @@ [Sources.X64]
> X64/InterlockedCompareExchange64.c | MSFT
> X64/InterlockedCompareExchange32.c | MSFT
> X64/InterlockedCompareExchange16.c | MSFT
> + X64/InterlockedDecrement.nasm | MSFT
> + X64/InterlockedIncrement.nasm | MSFT
> + SynchronizationMsc.c | MSFT
>
> X64/InterlockedCompareExchange64.nasm| INTEL
> X64/InterlockedCompareExchange32.nasm| INTEL
> X64/InterlockedCompareExchange16.nasm| INTEL
> -
> - X64/InterlockedDecrement.c | MSFT
> - X64/InterlockedIncrement.c | MSFT
> - SynchronizationMsc.c | MSFT
> -
> - X64/InterlockedDecrement.nasm| INTEL
> - X64/InterlockedIncrement.nasm| INTEL
> + X64/InterlockedDecrement.nasm | INTEL
> + X64/InterlockedIncrement.nasm | INTEL
> Synchronization.c | INTEL
>
> Ia32/InternalGetSpinLockProperties.c | GCC
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> h
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> h
> index 37edd7c188..8c363a8585 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> h
> +++
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> h
> @@ -27,8 +27,7 @@
>
> Performs an atomic increment of the 32-bit unsigned integer specified by
> Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to increment.
>
> @@ -47,8 +46,7 @@ InternalSyncIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned integer specified
> by
> Value and returns the decrement value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to decrement.
>
> diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> index 4ab293f243..d82e0205f5 100644
> --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> +++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> @@ -20,8 +20,7 @@
>
> Performs an atomic increment of the 32-bit unsigned integer specified by
> Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to increment.
>
> @@ -37,9 +36,10 @@ InternalSyncIncrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> + "movl $1, %%eax \n\t"
> "lock \n\t"
> - "incl %2 \n\t"
> - "movl %2, %%eax "
> + "xadd %%eax, %2 \n\t"
> + "inc %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> @@ -57,8 +57,7 @@ InternalSyncIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned integer specified
> by
> Value and returns the decremented value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to decrement.
>
> @@ -74,9 +73,10 @@ InternalSyncDecrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> - "lock \n\t"
> - "decl %2 \n\t"
> - "movl %2, %%eax "
> + "movl $-1, %%eax \n\t"
> + "lock \n\t"
> + "xadd %%eax, %2 \n\t"
> + "dec %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> deleted file mode 100644
> index 354a0e7ab1..0000000000
> --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> +++ /dev/null
> @@ -1,42 +0,0 @@
> -/** @file
> - InterlockedDecrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and conditions of the
> BSD License
> - which accompanies this distribution. The full text of the license may be
> found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> -
> -**/
> -
> -
> -
> -
> -/**
> - Performs an atomic decrement of an 32-bit unsigned integer.
> -
> - Performs an atomic decrement of the 32-bit unsigned integer specified by
> - Value and returns the decrement value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to decrement.
> -
> - @return The decrement value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncDecrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - _asm {
> - mov eax, Value
> - lock dec dword ptr [eax]
> - mov eax, [eax]
> - }
> -}
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> m
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> m
> index 4c46041186..dd5a8de3ed 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> m
> +++
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> m
> @@ -1,6 +1,6 @@
> ;------------------------------------------------------------------------------
> ;
> -; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> +; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> ; This program and the accompanying materials
> ; are licensed and made available under the terms and conditions of the
> BSD License
> ; which accompanies this distribution. The full text of the license may be
> found at
> @@ -32,8 +32,8 @@
> ;------------------------------------------------------------------------------
> global ASM_PFX(InternalSyncDecrement)
> ASM_PFX(InternalSyncDecrement):
> - mov eax, [esp + 4]
> - lock dec dword [eax]
> - mov eax, [eax]
> + mov ecx, [esp + 4]
> + mov eax, 0FFFFFFFFh
> + lock xadd dword [ecx], eax
> + dec eax
> ret
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> deleted file mode 100644
> index c61a550119..0000000000
> --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> +++ /dev/null
> @@ -1,43 +0,0 @@
> -/** @file
> - InterLockedIncrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and conditions of the
> BSD License
> - which accompanies this distribution. The full text of the license may be
> found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> -
> -**/
> -
> -
> -
> -
> -/**
> - Performs an atomic increment of an 32-bit unsigned integer.
> -
> - Performs an atomic increment of the 32-bit unsigned integer specified by
> - Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to increment.
> -
> - @return The incremented value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncIncrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - _asm {
> - mov eax, Value
> - lock inc dword ptr [eax]
> - mov eax, [eax]
> - }
> -}
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> index 3902c73275..0677e4bf78 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> +++
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> @@ -32,8 +32,9 @@
> ;------------------------------------------------------------------------------
> global ASM_PFX(InternalSyncIncrement)
> ASM_PFX(InternalSyncIncrement):
> - mov eax, [esp + 4]
> - lock inc dword [eax]
> - mov eax, [eax]
> + mov ecx, [esp + 4]
> + mov eax, 1
> + lock xadd dword [ecx], eax
> + inc eax
> ret
>
> diff --git a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> index 76c5a1275c..0ab59ca702 100644
> --- a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> +++ b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> @@ -231,8 +231,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned integer specified by
> Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -256,8 +255,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned integer specified
> by
> Value and returns the decremented value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> index 5ac548b19f..177739d3da 100644
> --- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> +++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> @@ -247,8 +247,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned integer specified by
> Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -272,8 +271,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned integer specified
> by
> Value and returns the decremented value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> index e3298c8ab4..6ab2d71870 100644
> --- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> +++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> @@ -249,8 +249,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned integer specified by
> Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -274,8 +273,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned integer specified
> by
> Value and returns the decremented value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> index 5224dd063f..4c4d6e3fc7 100644
> --- a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> +++ b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> @@ -15,14 +15,12 @@
>
>
>
> -
> /**
> Performs an atomic increment of an 32-bit unsigned integer.
>
> Performs an atomic increment of the 32-bit unsigned integer specified by
> Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to increment.
>
> @@ -38,9 +36,10 @@ InternalSyncIncrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> + "movl $1, %%eax \n\t"
> "lock \n\t"
> - "incl %2 \n\t"
> - "mov %2, %%eax "
> + "xadd %%eax, %2 \n\t"
> + "inc %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> @@ -57,8 +56,7 @@ InternalSyncIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned integer specified
> by
> Value and returns the decremented value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to decrement.
>
> @@ -74,9 +72,10 @@ InternalSyncDecrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> - "lock \n\t"
> - "decl %2 \n\t"
> - "mov %2, %%eax "
> + "movl $-1, %%eax \n\t"
> + "lock \n\t"
> + "xadd %%eax, %2 \n\t"
> + "dec %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> deleted file mode 100644
> index da402cd4c6..0000000000
> --- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> +++ /dev/null
> @@ -1,46 +0,0 @@
> -/** @file
> - InterlockedDecrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and conditions of the
> BSD License
> - which accompanies this distribution. The full text of the license may be
> found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> -
> -**/
> -
> -/**
> - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> -**/
> -
> -long _InterlockedDecrement(
> - long * lpAddend
> -);
> -
> -#pragma intrinsic(_InterlockedDecrement)
> -
> -/**
> - Performs an atomic decrement of an 32-bit unsigned integer.
> -
> - Performs an atomic decrement of the 32-bit unsigned integer specified by
> - Value and returns the decrement value. The decrement operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to decrement.
> -
> - @return The decrement value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncDecrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - return _InterlockedDecrement ((long *)(UINTN)(Value));
> -}
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> index 60f43111fe..dabdca945e 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> +++
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> @@ -1,6 +1,6 @@
> ;------------------------------------------------------------------------------
> ;
> -; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> +; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> ; This program and the accompanying materials
> ; are licensed and made available under the terms and conditions of the
> BSD License
> ; which accompanies this distribution. The full text of the license may be
> found at
> @@ -33,7 +33,7 @@
> ;------------------------------------------------------------------------------
> global ASM_PFX(InternalSyncDecrement)
> ASM_PFX(InternalSyncDecrement):
> - lock dec dword [rcx]
> - mov eax, [rcx]
> + mov eax, 0FFFFFFFFh
> + lock xadd dword [rcx], eax
> + dec eax
> ret
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
> deleted file mode 100644
> index bbd1384602..0000000000
> --- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
> +++ /dev/null
> @@ -1,46 +0,0 @@
> -/** @file
> - InterLockedIncrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and conditions of the
> BSD License
> - which accompanies this distribution. The full text of the license may be
> found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS OR IMPLIED.
> -
> -**/
> -
> -/**
> - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> -**/
> -
> -long _InterlockedIncrement(
> - long * lpAddend
> -);
> -
> -#pragma intrinsic(_InterlockedIncrement)
> -
> -/**
> - Performs an atomic increment of an 32-bit unsigned integer.
> -
> - Performs an atomic increment of the 32-bit unsigned integer specified by
> - Value and returns the incremented value. The increment operation must
> be
> - performed using MP safe mechanisms. The state of the return value is
> not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to increment.
> -
> - @return The incremented value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncIncrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - return _InterlockedIncrement ((long *)(UINTN)(Value));
> -}
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> index 7f877b5774..77379d998e 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> +++
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> @@ -33,7 +33,8 @@
> ;------------------------------------------------------------------------------
> global ASM_PFX(InternalSyncIncrement)
> ASM_PFX(InternalSyncIncrement):
> - lock inc dword [rcx]
> - mov eax, [rcx]
> + mov eax, 1
> + lock xadd dword [rcx], eax
> + inc eax
> ret
>
> --
> 2.16.1.windows.1
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-10 11:37 ` Yao, Jiewen
@ 2018-09-10 14:59 ` Ni, Ruiyu
2018-09-10 15:17 ` Yao, Jiewen
0 siblings, 1 reply; 11+ messages in thread
From: Ni, Ruiyu @ 2018-09-10 14:59 UTC (permalink / raw)
To: Yao, Jiewen; +Cc: edk2-devel@lists.01.org, Gao, Liming, Kinney, Michael D
I didn’t find such instruction in SDM.
发自我的 iPhone
> 在 2018年9月10日，下午7:37，Yao, Jiewen <jiewen.yao@intel.com> 写道：
>
> Hi
> Can we use XSUB for decrement?
>
> Thank you
> Yao Jiewen
>
>> -----Original Message-----
>> From: Ni, Ruiyu
>> Sent: Monday, September 10, 2018 6:06 PM
>> To: edk2-devel@lists.01.org
>> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
>> <liming.gao@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>
>> Subject: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement
>> return value
>>
>> Today's InterlockedIncrement()/InterlockedDecrement() guarantees to
>> perform atomic increment/decrement but doesn't guarantee the return
>> value equals to the new value.
>>
>> The patch fixes the behavior to use "XADD" instruction to guarantee
>> the return value equals to the new value.
>>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
>> Cc: Jiewen Yao <jiewen.yao@intel.com>
>> Cc: Liming Gao <liming.gao@intel.com>
>> Cc: Michael D Kinney <michael.d.kinney@intel.com>
>> ---
>> MdePkg/Include/Library/SynchronizationLib.h | 6 +--
>> .../BaseSynchronizationLib.inf | 18 ++++-----
>> .../BaseSynchronizationLibInternals.h | 6 +--
>> .../BaseSynchronizationLib/Ia32/GccInline.c | 18 ++++-----
>> .../Ia32/InterlockedDecrement.c | 42
>> --------------------
>> .../Ia32/InterlockedDecrement.nasm | 10 ++---
>> .../Ia32/InterlockedIncrement.c | 43
>> --------------------
>> .../Ia32/InterlockedIncrement.nasm | 7 ++--
>> .../BaseSynchronizationLib/Synchronization.c | 6 +--
>> .../BaseSynchronizationLib/SynchronizationGcc.c | 6 +--
>> .../BaseSynchronizationLib/SynchronizationMsc.c | 6 +--
>> .../Library/BaseSynchronizationLib/X64/GccInline.c | 19 +++++----
>> .../X64/InterlockedDecrement.c | 46
>> ----------------------
>> .../X64/InterlockedDecrement.nasm | 8 ++--
>> .../X64/InterlockedIncrement.c | 46
>> ----------------------
>> .../X64/InterlockedIncrement.nasm | 5 ++-
>> 16 files changed, 52 insertions(+), 240 deletions(-)
>> delete mode 100644
>> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
>> delete mode 100644
>> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
>> delete mode 100644
>> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
>> delete mode 100644
>> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
>>
>> diff --git a/MdePkg/Include/Library/SynchronizationLib.h
>> b/MdePkg/Include/Library/SynchronizationLib.h
>> index da69f6ff5e..ce3bce04f5 100644
>> --- a/MdePkg/Include/Library/SynchronizationLib.h
>> +++ b/MdePkg/Include/Library/SynchronizationLib.h
>> @@ -144,8 +144,7 @@ ReleaseSpinLock (
>>
>> Performs an atomic increment of the 32-bit unsigned integer specified by
>> Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> @@ -166,8 +165,7 @@ InterlockedIncrement (
>>
>> Performs an atomic decrement of the 32-bit unsigned integer specified
>> by
>> Value and returns the decremented value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
>> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
>> index 0be1d4331f..b971cd138d 100755
>> --- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
>> +++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
>> @@ -34,9 +34,9 @@ [Sources.IA32]
>> Ia32/InterlockedCompareExchange64.c | MSFT
>> Ia32/InterlockedCompareExchange32.c | MSFT
>> Ia32/InterlockedCompareExchange16.c | MSFT
>> - Ia32/InterlockedDecrement.c | MSFT
>> - Ia32/InterlockedIncrement.c | MSFT
>> - SynchronizationMsc.c | MSFT
>> + Ia32/InterlockedDecrement.nasm | MSFT
>> + Ia32/InterlockedIncrement.nasm | MSFT
>> + SynchronizationMsc.c | MSFT
>>
>> Ia32/InterlockedCompareExchange64.nasm| INTEL
>> Ia32/InterlockedCompareExchange32.nasm| INTEL
>> @@ -54,17 +54,15 @@ [Sources.X64]
>> X64/InterlockedCompareExchange64.c | MSFT
>> X64/InterlockedCompareExchange32.c | MSFT
>> X64/InterlockedCompareExchange16.c | MSFT
>> + X64/InterlockedDecrement.nasm | MSFT
>> + X64/InterlockedIncrement.nasm | MSFT
>> + SynchronizationMsc.c | MSFT
>>
>> X64/InterlockedCompareExchange64.nasm| INTEL
>> X64/InterlockedCompareExchange32.nasm| INTEL
>> X64/InterlockedCompareExchange16.nasm| INTEL
>> -
>> - X64/InterlockedDecrement.c | MSFT
>> - X64/InterlockedIncrement.c | MSFT
>> - SynchronizationMsc.c | MSFT
>> -
>> - X64/InterlockedDecrement.nasm| INTEL
>> - X64/InterlockedIncrement.nasm| INTEL
>> + X64/InterlockedDecrement.nasm | INTEL
>> + X64/InterlockedIncrement.nasm | INTEL
>> Synchronization.c | INTEL
>>
>> Ia32/InternalGetSpinLockProperties.c | GCC
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
>> h
>> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
>> h
>> index 37edd7c188..8c363a8585 100644
>> ---
>> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
>> h
>> +++
>> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
>> h
>> @@ -27,8 +27,7 @@
>>
>> Performs an atomic increment of the 32-bit unsigned integer specified by
>> Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> @param Value A pointer to the 32-bit value to increment.
>>
>> @@ -47,8 +46,7 @@ InternalSyncIncrement (
>>
>> Performs an atomic decrement of the 32-bit unsigned integer specified
>> by
>> Value and returns the decrement value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> @param Value A pointer to the 32-bit value to decrement.
>>
>> diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
>> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
>> index 4ab293f243..d82e0205f5 100644
>> --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
>> +++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
>> @@ -20,8 +20,7 @@
>>
>> Performs an atomic increment of the 32-bit unsigned integer specified by
>> Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> @param Value A pointer to the 32-bit value to increment.
>>
>> @@ -37,9 +36,10 @@ InternalSyncIncrement (
>> UINT32 Result;
>>
>> __asm__ __volatile__ (
>> + "movl $1, %%eax \n\t"
>> "lock \n\t"
>> - "incl %2 \n\t"
>> - "movl %2, %%eax "
>> + "xadd %%eax, %2 \n\t"
>> + "inc %%eax "
>> : "=a" (Result), // %0
>> "=m" (*Value) // %1
>> : "m" (*Value) // %2
>> @@ -57,8 +57,7 @@ InternalSyncIncrement (
>>
>> Performs an atomic decrement of the 32-bit unsigned integer specified
>> by
>> Value and returns the decremented value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> @param Value A pointer to the 32-bit value to decrement.
>>
>> @@ -74,9 +73,10 @@ InternalSyncDecrement (
>> UINT32 Result;
>>
>> __asm__ __volatile__ (
>> - "lock \n\t"
>> - "decl %2 \n\t"
>> - "movl %2, %%eax "
>> + "movl $-1, %%eax \n\t"
>> + "lock \n\t"
>> + "xadd %%eax, %2 \n\t"
>> + "dec %%eax "
>> : "=a" (Result), // %0
>> "=m" (*Value) // %1
>> : "m" (*Value) // %2
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
>> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
>> deleted file mode 100644
>> index 354a0e7ab1..0000000000
>> --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
>> +++ /dev/null
>> @@ -1,42 +0,0 @@
>> -/** @file
>> - InterlockedDecrement function
>> -
>> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
>> - This program and the accompanying materials
>> - are licensed and made available under the terms and conditions of the
>> BSD License
>> - which accompanies this distribution. The full text of the license may be
>> found at
>> - http://opensource.org/licenses/bsd-license.php.
>> -
>> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
>> BASIS,
>> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
>> EXPRESS OR IMPLIED.
>> -
>> -**/
>> -
>> -
>> -
>> -
>> -/**
>> - Performs an atomic decrement of an 32-bit unsigned integer.
>> -
>> - Performs an atomic decrement of the 32-bit unsigned integer specified by
>> - Value and returns the decrement value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> -
>> - @param Value A pointer to the 32-bit value to decrement.
>> -
>> - @return The decrement value.
>> -
>> -**/
>> -UINT32
>> -EFIAPI
>> -InternalSyncDecrement (
>> - IN volatile UINT32 *Value
>> - )
>> -{
>> - _asm {
>> - mov eax, Value
>> - lock dec dword ptr [eax]
>> - mov eax, [eax]
>> - }
>> -}
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
>> m
>> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
>> m
>> index 4c46041186..dd5a8de3ed 100644
>> ---
>> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
>> m
>> +++
>> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
>> m
>> @@ -1,6 +1,6 @@
>> ;------------------------------------------------------------------------------
>> ;
>> -; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
>> +; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>> ; This program and the accompanying materials
>> ; are licensed and made available under the terms and conditions of the
>> BSD License
>> ; which accompanies this distribution. The full text of the license may be
>> found at
>> @@ -32,8 +32,8 @@
>> ;------------------------------------------------------------------------------
>> global ASM_PFX(InternalSyncDecrement)
>> ASM_PFX(InternalSyncDecrement):
>> - mov eax, [esp + 4]
>> - lock dec dword [eax]
>> - mov eax, [eax]
>> + mov ecx, [esp + 4]
>> + mov eax, 0FFFFFFFFh
>> + lock xadd dword [ecx], eax
>> + dec eax
>> ret
>> -
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
>> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
>> deleted file mode 100644
>> index c61a550119..0000000000
>> --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
>> +++ /dev/null
>> @@ -1,43 +0,0 @@
>> -/** @file
>> - InterLockedIncrement function
>> -
>> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
>> - This program and the accompanying materials
>> - are licensed and made available under the terms and conditions of the
>> BSD License
>> - which accompanies this distribution. The full text of the license may be
>> found at
>> - http://opensource.org/licenses/bsd-license.php.
>> -
>> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
>> BASIS,
>> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
>> EXPRESS OR IMPLIED.
>> -
>> -**/
>> -
>> -
>> -
>> -
>> -/**
>> - Performs an atomic increment of an 32-bit unsigned integer.
>> -
>> - Performs an atomic increment of the 32-bit unsigned integer specified by
>> - Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> -
>> - @param Value A pointer to the 32-bit value to increment.
>> -
>> - @return The incremented value.
>> -
>> -**/
>> -UINT32
>> -EFIAPI
>> -InternalSyncIncrement (
>> - IN volatile UINT32 *Value
>> - )
>> -{
>> - _asm {
>> - mov eax, Value
>> - lock inc dword ptr [eax]
>> - mov eax, [eax]
>> - }
>> -}
>> -
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
>> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
>> index 3902c73275..0677e4bf78 100644
>> ---
>> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
>> +++
>> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
>> @@ -32,8 +32,9 @@
>> ;------------------------------------------------------------------------------
>> global ASM_PFX(InternalSyncIncrement)
>> ASM_PFX(InternalSyncIncrement):
>> - mov eax, [esp + 4]
>> - lock inc dword [eax]
>> - mov eax, [eax]
>> + mov ecx, [esp + 4]
>> + mov eax, 1
>> + lock xadd dword [ecx], eax
>> + inc eax
>> ret
>>
>> diff --git a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
>> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
>> index 76c5a1275c..0ab59ca702 100644
>> --- a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
>> +++ b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
>> @@ -231,8 +231,7 @@ ReleaseSpinLock (
>>
>> Performs an atomic increment of the 32-bit unsigned integer specified by
>> Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> @@ -256,8 +255,7 @@ InterlockedIncrement (
>>
>> Performs an atomic decrement of the 32-bit unsigned integer specified
>> by
>> Value and returns the decremented value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
>> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
>> index 5ac548b19f..177739d3da 100644
>> --- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
>> +++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
>> @@ -247,8 +247,7 @@ ReleaseSpinLock (
>>
>> Performs an atomic increment of the 32-bit unsigned integer specified by
>> Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> @@ -272,8 +271,7 @@ InterlockedIncrement (
>>
>> Performs an atomic decrement of the 32-bit unsigned integer specified
>> by
>> Value and returns the decremented value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
>> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
>> index e3298c8ab4..6ab2d71870 100644
>> --- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
>> +++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
>> @@ -249,8 +249,7 @@ ReleaseSpinLock (
>>
>> Performs an atomic increment of the 32-bit unsigned integer specified by
>> Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> @@ -274,8 +273,7 @@ InterlockedIncrement (
>>
>> Performs an atomic decrement of the 32-bit unsigned integer specified
>> by
>> Value and returns the decremented value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> If Value is NULL, then ASSERT().
>>
>> diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
>> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
>> index 5224dd063f..4c4d6e3fc7 100644
>> --- a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
>> +++ b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
>> @@ -15,14 +15,12 @@
>>
>>
>>
>> -
>> /**
>> Performs an atomic increment of an 32-bit unsigned integer.
>>
>> Performs an atomic increment of the 32-bit unsigned integer specified by
>> Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> @param Value A pointer to the 32-bit value to increment.
>>
>> @@ -38,9 +36,10 @@ InternalSyncIncrement (
>> UINT32 Result;
>>
>> __asm__ __volatile__ (
>> + "movl $1, %%eax \n\t"
>> "lock \n\t"
>> - "incl %2 \n\t"
>> - "mov %2, %%eax "
>> + "xadd %%eax, %2 \n\t"
>> + "inc %%eax "
>> : "=a" (Result), // %0
>> "=m" (*Value) // %1
>> : "m" (*Value) // %2
>> @@ -57,8 +56,7 @@ InternalSyncIncrement (
>>
>> Performs an atomic decrement of the 32-bit unsigned integer specified
>> by
>> Value and returns the decremented value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> + performed using MP safe mechanisms.
>>
>> @param Value A pointer to the 32-bit value to decrement.
>>
>> @@ -74,9 +72,10 @@ InternalSyncDecrement (
>> UINT32 Result;
>>
>> __asm__ __volatile__ (
>> - "lock \n\t"
>> - "decl %2 \n\t"
>> - "mov %2, %%eax "
>> + "movl $-1, %%eax \n\t"
>> + "lock \n\t"
>> + "xadd %%eax, %2 \n\t"
>> + "dec %%eax "
>> : "=a" (Result), // %0
>> "=m" (*Value) // %1
>> : "m" (*Value) // %2
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
>> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
>> deleted file mode 100644
>> index da402cd4c6..0000000000
>> --- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
>> +++ /dev/null
>> @@ -1,46 +0,0 @@
>> -/** @file
>> - InterlockedDecrement function
>> -
>> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
>> - This program and the accompanying materials
>> - are licensed and made available under the terms and conditions of the
>> BSD License
>> - which accompanies this distribution. The full text of the license may be
>> found at
>> - http://opensource.org/licenses/bsd-license.php.
>> -
>> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
>> BASIS,
>> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
>> EXPRESS OR IMPLIED.
>> -
>> -**/
>> -
>> -/**
>> - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
>> -**/
>> -
>> -long _InterlockedDecrement(
>> - long * lpAddend
>> -);
>> -
>> -#pragma intrinsic(_InterlockedDecrement)
>> -
>> -/**
>> - Performs an atomic decrement of an 32-bit unsigned integer.
>> -
>> - Performs an atomic decrement of the 32-bit unsigned integer specified by
>> - Value and returns the decrement value. The decrement operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> -
>> - @param Value A pointer to the 32-bit value to decrement.
>> -
>> - @return The decrement value.
>> -
>> -**/
>> -UINT32
>> -EFIAPI
>> -InternalSyncDecrement (
>> - IN volatile UINT32 *Value
>> - )
>> -{
>> - return _InterlockedDecrement ((long *)(UINTN)(Value));
>> -}
>> -
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
>> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
>> index 60f43111fe..dabdca945e 100644
>> ---
>> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
>> +++
>> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
>> @@ -1,6 +1,6 @@
>> ;------------------------------------------------------------------------------
>> ;
>> -; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
>> +; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>> ; This program and the accompanying materials
>> ; are licensed and made available under the terms and conditions of the
>> BSD License
>> ; which accompanies this distribution. The full text of the license may be
>> found at
>> @@ -33,7 +33,7 @@
>> ;------------------------------------------------------------------------------
>> global ASM_PFX(InternalSyncDecrement)
>> ASM_PFX(InternalSyncDecrement):
>> - lock dec dword [rcx]
>> - mov eax, [rcx]
>> + mov eax, 0FFFFFFFFh
>> + lock xadd dword [rcx], eax
>> + dec eax
>> ret
>> -
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
>> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
>> deleted file mode 100644
>> index bbd1384602..0000000000
>> --- a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
>> +++ /dev/null
>> @@ -1,46 +0,0 @@
>> -/** @file
>> - InterLockedIncrement function
>> -
>> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
>> - This program and the accompanying materials
>> - are licensed and made available under the terms and conditions of the
>> BSD License
>> - which accompanies this distribution. The full text of the license may be
>> found at
>> - http://opensource.org/licenses/bsd-license.php.
>> -
>> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
>> BASIS,
>> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
>> EXPRESS OR IMPLIED.
>> -
>> -**/
>> -
>> -/**
>> - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
>> -**/
>> -
>> -long _InterlockedIncrement(
>> - long * lpAddend
>> -);
>> -
>> -#pragma intrinsic(_InterlockedIncrement)
>> -
>> -/**
>> - Performs an atomic increment of an 32-bit unsigned integer.
>> -
>> - Performs an atomic increment of the 32-bit unsigned integer specified by
>> - Value and returns the incremented value. The increment operation must
>> be
>> - performed using MP safe mechanisms. The state of the return value is
>> not
>> - guaranteed to be MP safe.
>> -
>> - @param Value A pointer to the 32-bit value to increment.
>> -
>> - @return The incremented value.
>> -
>> -**/
>> -UINT32
>> -EFIAPI
>> -InternalSyncIncrement (
>> - IN volatile UINT32 *Value
>> - )
>> -{
>> - return _InterlockedIncrement ((long *)(UINTN)(Value));
>> -}
>> -
>> diff --git
>> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
>> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
>> index 7f877b5774..77379d998e 100644
>> ---
>> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
>> +++
>> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
>> @@ -33,7 +33,8 @@
>> ;------------------------------------------------------------------------------
>> global ASM_PFX(InternalSyncIncrement)
>> ASM_PFX(InternalSyncIncrement):
>> - lock inc dword [rcx]
>> - mov eax, [rcx]
>> + mov eax, 1
>> + lock xadd dword [rcx], eax
>> + inc eax
>> ret
>>
>> --
>> 2.16.1.windows.1
>
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-10 14:59 ` Ni, Ruiyu
@ 2018-09-10 15:17 ` Yao, Jiewen
0 siblings, 0 replies; 11+ messages in thread
From: Yao, Jiewen @ 2018-09-10 15:17 UTC (permalink / raw)
To: Ni, Ruiyu; +Cc: edk2-devel@lists.01.org, Gao, Liming, Kinney, Michael D
You are right. My mistake.
> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Monday, September 10, 2018 10:59 PM
> To: Yao, Jiewen <jiewen.yao@intel.com>
> Cc: edk2-devel@lists.01.org; Gao, Liming <liming.gao@intel.com>; Kinney,
> Michael D <michael.d.kinney@intel.com>
> Subject: Re: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
>
> I didn’t find such instruction in SDM.
>
> 发自我的 iPhone
>
> > 在 2018年9月10日，下午7:37，Yao, Jiewen <jiewen.yao@intel.com>
> 写道：
> >
> > Hi
> > Can we use XSUB for decrement?
> >
> > Thank you
> > Yao Jiewen
> >
> >> -----Original Message-----
> >> From: Ni, Ruiyu
> >> Sent: Monday, September 10, 2018 6:06 PM
> >> To: edk2-devel@lists.01.org
> >> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> >> <liming.gao@intel.com>; Kinney, Michael D
> <michael.d.kinney@intel.com>
> >> Subject: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement
> >> return value
> >>
> >> Today's InterlockedIncrement()/InterlockedDecrement() guarantees to
> >> perform atomic increment/decrement but doesn't guarantee the return
> >> value equals to the new value.
> >>
> >> The patch fixes the behavior to use "XADD" instruction to guarantee
> >> the return value equals to the new value.
> >>
> >> Contributed-under: TianoCore Contribution Agreement 1.1
> >> Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> >> Cc: Jiewen Yao <jiewen.yao@intel.com>
> >> Cc: Liming Gao <liming.gao@intel.com>
> >> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> >> ---
> >> MdePkg/Include/Library/SynchronizationLib.h | 6 +--
> >> .../BaseSynchronizationLib.inf | 18 ++++-----
> >> .../BaseSynchronizationLibInternals.h | 6 +--
> >> .../BaseSynchronizationLib/Ia32/GccInline.c | 18 ++++-----
> >> .../Ia32/InterlockedDecrement.c | 42
> >> --------------------
> >> .../Ia32/InterlockedDecrement.nasm | 10 ++---
> >> .../Ia32/InterlockedIncrement.c | 43
> >> --------------------
> >> .../Ia32/InterlockedIncrement.nasm | 7 ++--
> >> .../BaseSynchronizationLib/Synchronization.c | 6 +--
> >> .../BaseSynchronizationLib/SynchronizationGcc.c | 6 +--
> >> .../BaseSynchronizationLib/SynchronizationMsc.c | 6 +--
> >> .../Library/BaseSynchronizationLib/X64/GccInline.c | 19 +++++----
> >> .../X64/InterlockedDecrement.c | 46
> >> ----------------------
> >> .../X64/InterlockedDecrement.nasm | 8 ++--
> >> .../X64/InterlockedIncrement.c | 46
> >> ----------------------
> >> .../X64/InterlockedIncrement.nasm | 5 ++-
> >> 16 files changed, 52 insertions(+), 240 deletions(-)
> >> delete mode 100644
> >> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> >> delete mode 100644
> >> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> >> delete mode 100644
> >> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> >> delete mode 100644
> >> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
> >>
> >> diff --git a/MdePkg/Include/Library/SynchronizationLib.h
> >> b/MdePkg/Include/Library/SynchronizationLib.h
> >> index da69f6ff5e..ce3bce04f5 100644
> >> --- a/MdePkg/Include/Library/SynchronizationLib.h
> >> +++ b/MdePkg/Include/Library/SynchronizationLib.h
> >> @@ -144,8 +144,7 @@ ReleaseSpinLock (
> >>
> >> Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> @@ -166,8 +165,7 @@ InterlockedIncrement (
> >>
> >> Performs an atomic decrement of the 32-bit unsigned integer specified
> >> by
> >> Value and returns the decremented value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> diff --git
> >> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> >> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> >> index 0be1d4331f..b971cd138d 100755
> >> --- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> >> +++
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
> >> @@ -34,9 +34,9 @@ [Sources.IA32]
> >> Ia32/InterlockedCompareExchange64.c | MSFT
> >> Ia32/InterlockedCompareExchange32.c | MSFT
> >> Ia32/InterlockedCompareExchange16.c | MSFT
> >> - Ia32/InterlockedDecrement.c | MSFT
> >> - Ia32/InterlockedIncrement.c | MSFT
> >> - SynchronizationMsc.c | MSFT
> >> + Ia32/InterlockedDecrement.nasm | MSFT
> >> + Ia32/InterlockedIncrement.nasm | MSFT
> >> + SynchronizationMsc.c | MSFT
> >>
> >> Ia32/InterlockedCompareExchange64.nasm| INTEL
> >> Ia32/InterlockedCompareExchange32.nasm| INTEL
> >> @@ -54,17 +54,15 @@ [Sources.X64]
> >> X64/InterlockedCompareExchange64.c | MSFT
> >> X64/InterlockedCompareExchange32.c | MSFT
> >> X64/InterlockedCompareExchange16.c | MSFT
> >> + X64/InterlockedDecrement.nasm | MSFT
> >> + X64/InterlockedIncrement.nasm | MSFT
> >> + SynchronizationMsc.c | MSFT
> >>
> >> X64/InterlockedCompareExchange64.nasm| INTEL
> >> X64/InterlockedCompareExchange32.nasm| INTEL
> >> X64/InterlockedCompareExchange16.nasm| INTEL
> >> -
> >> - X64/InterlockedDecrement.c | MSFT
> >> - X64/InterlockedIncrement.c | MSFT
> >> - SynchronizationMsc.c | MSFT
> >> -
> >> - X64/InterlockedDecrement.nasm| INTEL
> >> - X64/InterlockedIncrement.nasm| INTEL
> >> + X64/InterlockedDecrement.nasm | INTEL
> >> + X64/InterlockedIncrement.nasm | INTEL
> >> Synchronization.c | INTEL
> >>
> >> Ia32/InternalGetSpinLockProperties.c | GCC
> >> diff --git
> >>
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> >> h
> >>
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> >> h
> >> index 37edd7c188..8c363a8585 100644
> >> ---
> >>
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> >> h
> >> +++
> >>
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLibInternals.
> >> h
> >> @@ -27,8 +27,7 @@
> >>
> >> Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> @param Value A pointer to the 32-bit value to increment.
> >>
> >> @@ -47,8 +46,7 @@ InternalSyncIncrement (
> >>
> >> Performs an atomic decrement of the 32-bit unsigned integer specified
> >> by
> >> Value and returns the decrement value. The decrement operation must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> @param Value A pointer to the 32-bit value to decrement.
> >>
> >> diff --git a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> >> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> >> index 4ab293f243..d82e0205f5 100644
> >> --- a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> >> +++ b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> >> @@ -20,8 +20,7 @@
> >>
> >> Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> @param Value A pointer to the 32-bit value to increment.
> >>
> >> @@ -37,9 +36,10 @@ InternalSyncIncrement (
> >> UINT32 Result;
> >>
> >> __asm__ __volatile__ (
> >> + "movl $1, %%eax \n\t"
> >> "lock \n\t"
> >> - "incl %2 \n\t"
> >> - "movl %2, %%eax "
> >> + "xadd %%eax, %2 \n\t"
> >> + "inc %%eax "
> >> : "=a" (Result), // %0
> >> "=m" (*Value) // %1
> >> : "m" (*Value) // %2
> >> @@ -57,8 +57,7 @@ InternalSyncIncrement (
> >>
> >> Performs an atomic decrement of the 32-bit unsigned integer specified
> >> by
> >> Value and returns the decremented value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> @param Value A pointer to the 32-bit value to decrement.
> >>
> >> @@ -74,9 +73,10 @@ InternalSyncDecrement (
> >> UINT32 Result;
> >>
> >> __asm__ __volatile__ (
> >> - "lock \n\t"
> >> - "decl %2 \n\t"
> >> - "movl %2, %%eax "
> >> + "movl $-1, %%eax \n\t"
> >> + "lock \n\t"
> >> + "xadd %%eax, %2 \n\t"
> >> + "dec %%eax "
> >> : "=a" (Result), // %0
> >> "=m" (*Value) // %1
> >> : "m" (*Value) // %2
> >> diff --git
> >> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> >> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> >> deleted file mode 100644
> >> index 354a0e7ab1..0000000000
> >> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.c
> >> +++ /dev/null
> >> @@ -1,42 +0,0 @@
> >> -/** @file
> >> - InterlockedDecrement function
> >> -
> >> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> >> - This program and the accompanying materials
> >> - are licensed and made available under the terms and conditions of the
> >> BSD License
> >> - which accompanies this distribution. The full text of the license may
> be
> >> found at
> >> - http://opensource.org/licenses/bsd-license.php.
> >> -
> >> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS
> IS"
> >> BASIS,
> >> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> >> EXPRESS OR IMPLIED.
> >> -
> >> -**/
> >> -
> >> -
> >> -
> >> -
> >> -/**
> >> - Performs an atomic decrement of an 32-bit unsigned integer.
> >> -
> >> - Performs an atomic decrement of the 32-bit unsigned integer
> specified by
> >> - Value and returns the decrement value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> -
> >> - @param Value A pointer to the 32-bit value to decrement.
> >> -
> >> - @return The decrement value.
> >> -
> >> -**/
> >> -UINT32
> >> -EFIAPI
> >> -InternalSyncDecrement (
> >> - IN volatile UINT32 *Value
> >> - )
> >> -{
> >> - _asm {
> >> - mov eax, Value
> >> - lock dec dword ptr [eax]
> >> - mov eax, [eax]
> >> - }
> >> -}
> >> diff --git
> >>
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> >> m
> >>
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> >> m
> >> index 4c46041186..dd5a8de3ed 100644
> >> ---
> >>
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> >> m
> >> +++
> >>
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDecrement.nas
> >> m
> >> @@ -1,6 +1,6 @@
> >> ;------------------------------------------------------------------------------
> >> ;
> >> -; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> >> +; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> >> ; This program and the accompanying materials
> >> ; are licensed and made available under the terms and conditions of the
> >> BSD License
> >> ; which accompanies this distribution. The full text of the license may be
> >> found at
> >> @@ -32,8 +32,8 @@
> >> ;------------------------------------------------------------------------------
> >> global ASM_PFX(InternalSyncDecrement)
> >> ASM_PFX(InternalSyncDecrement):
> >> - mov eax, [esp + 4]
> >> - lock dec dword [eax]
> >> - mov eax, [eax]
> >> + mov ecx, [esp + 4]
> >> + mov eax, 0FFFFFFFFh
> >> + lock xadd dword [ecx], eax
> >> + dec eax
> >> ret
> >> -
> >> diff --git
> >> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> >> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> >> deleted file mode 100644
> >> index c61a550119..0000000000
> >> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.c
> >> +++ /dev/null
> >> @@ -1,43 +0,0 @@
> >> -/** @file
> >> - InterLockedIncrement function
> >> -
> >> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> >> - This program and the accompanying materials
> >> - are licensed and made available under the terms and conditions of the
> >> BSD License
> >> - which accompanies this distribution. The full text of the license may
> be
> >> found at
> >> - http://opensource.org/licenses/bsd-license.php.
> >> -
> >> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS
> IS"
> >> BASIS,
> >> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> >> EXPRESS OR IMPLIED.
> >> -
> >> -**/
> >> -
> >> -
> >> -
> >> -
> >> -/**
> >> - Performs an atomic increment of an 32-bit unsigned integer.
> >> -
> >> - Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> - Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> -
> >> - @param Value A pointer to the 32-bit value to increment.
> >> -
> >> - @return The incremented value.
> >> -
> >> -**/
> >> -UINT32
> >> -EFIAPI
> >> -InternalSyncIncrement (
> >> - IN volatile UINT32 *Value
> >> - )
> >> -{
> >> - _asm {
> >> - mov eax, Value
> >> - lock inc dword ptr [eax]
> >> - mov eax, [eax]
> >> - }
> >> -}
> >> -
> >> diff --git
> >>
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> >>
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> >> index 3902c73275..0677e4bf78 100644
> >> ---
> >>
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> >> +++
> >>
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIncrement.nasm
> >> @@ -32,8 +32,9 @@
> >> ;------------------------------------------------------------------------------
> >> global ASM_PFX(InternalSyncIncrement)
> >> ASM_PFX(InternalSyncIncrement):
> >> - mov eax, [esp + 4]
> >> - lock inc dword [eax]
> >> - mov eax, [eax]
> >> + mov ecx, [esp + 4]
> >> + mov eax, 1
> >> + lock xadd dword [ecx], eax
> >> + inc eax
> >> ret
> >>
> >> diff --git a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> >> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> >> index 76c5a1275c..0ab59ca702 100644
> >> --- a/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> >> +++ b/MdePkg/Library/BaseSynchronizationLib/Synchronization.c
> >> @@ -231,8 +231,7 @@ ReleaseSpinLock (
> >>
> >> Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> @@ -256,8 +255,7 @@ InterlockedIncrement (
> >>
> >> Performs an atomic decrement of the 32-bit unsigned integer specified
> >> by
> >> Value and returns the decremented value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> >> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> >> index 5ac548b19f..177739d3da 100644
> >> --- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> >> +++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationGcc.c
> >> @@ -247,8 +247,7 @@ ReleaseSpinLock (
> >>
> >> Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> @@ -272,8 +271,7 @@ InterlockedIncrement (
> >>
> >> Performs an atomic decrement of the 32-bit unsigned integer specified
> >> by
> >> Value and returns the decremented value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> >> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> >> index e3298c8ab4..6ab2d71870 100644
> >> --- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> >> +++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c
> >> @@ -249,8 +249,7 @@ ReleaseSpinLock (
> >>
> >> Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> @@ -274,8 +273,7 @@ InterlockedIncrement (
> >>
> >> Performs an atomic decrement of the 32-bit unsigned integer specified
> >> by
> >> Value and returns the decremented value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> If Value is NULL, then ASSERT().
> >>
> >> diff --git a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> >> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> >> index 5224dd063f..4c4d6e3fc7 100644
> >> --- a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> >> +++ b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> >> @@ -15,14 +15,12 @@
> >>
> >>
> >>
> >> -
> >> /**
> >> Performs an atomic increment of an 32-bit unsigned integer.
> >>
> >> Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> @param Value A pointer to the 32-bit value to increment.
> >>
> >> @@ -38,9 +36,10 @@ InternalSyncIncrement (
> >> UINT32 Result;
> >>
> >> __asm__ __volatile__ (
> >> + "movl $1, %%eax \n\t"
> >> "lock \n\t"
> >> - "incl %2 \n\t"
> >> - "mov %2, %%eax "
> >> + "xadd %%eax, %2 \n\t"
> >> + "inc %%eax "
> >> : "=a" (Result), // %0
> >> "=m" (*Value) // %1
> >> : "m" (*Value) // %2
> >> @@ -57,8 +56,7 @@ InternalSyncIncrement (
> >>
> >> Performs an atomic decrement of the 32-bit unsigned integer specified
> >> by
> >> Value and returns the decremented value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> + performed using MP safe mechanisms.
> >>
> >> @param Value A pointer to the 32-bit value to decrement.
> >>
> >> @@ -74,9 +72,10 @@ InternalSyncDecrement (
> >> UINT32 Result;
> >>
> >> __asm__ __volatile__ (
> >> - "lock \n\t"
> >> - "decl %2 \n\t"
> >> - "mov %2, %%eax "
> >> + "movl $-1, %%eax \n\t"
> >> + "lock \n\t"
> >> + "xadd %%eax, %2 \n\t"
> >> + "dec %%eax "
> >> : "=a" (Result), // %0
> >> "=m" (*Value) // %1
> >> : "m" (*Value) // %2
> >> diff --git
> >> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> >> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> >> deleted file mode 100644
> >> index da402cd4c6..0000000000
> >> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.c
> >> +++ /dev/null
> >> @@ -1,46 +0,0 @@
> >> -/** @file
> >> - InterlockedDecrement function
> >> -
> >> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> >> - This program and the accompanying materials
> >> - are licensed and made available under the terms and conditions of the
> >> BSD License
> >> - which accompanies this distribution. The full text of the license may
> be
> >> found at
> >> - http://opensource.org/licenses/bsd-license.php.
> >> -
> >> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS
> IS"
> >> BASIS,
> >> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> >> EXPRESS OR IMPLIED.
> >> -
> >> -**/
> >> -
> >> -/**
> >> - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> >> -**/
> >> -
> >> -long _InterlockedDecrement(
> >> - long * lpAddend
> >> -);
> >> -
> >> -#pragma intrinsic(_InterlockedDecrement)
> >> -
> >> -/**
> >> - Performs an atomic decrement of an 32-bit unsigned integer.
> >> -
> >> - Performs an atomic decrement of the 32-bit unsigned integer
> specified by
> >> - Value and returns the decrement value. The decrement operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> -
> >> - @param Value A pointer to the 32-bit value to decrement.
> >> -
> >> - @return The decrement value.
> >> -
> >> -**/
> >> -UINT32
> >> -EFIAPI
> >> -InternalSyncDecrement (
> >> - IN volatile UINT32 *Value
> >> - )
> >> -{
> >> - return _InterlockedDecrement ((long *)(UINTN)(Value));
> >> -}
> >> -
> >> diff --git
> >>
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> >>
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> >> index 60f43111fe..dabdca945e 100644
> >> ---
> >>
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> >> +++
> >>
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm
> >> @@ -1,6 +1,6 @@
> >> ;------------------------------------------------------------------------------
> >> ;
> >> -; Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> >> +; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> >> ; This program and the accompanying materials
> >> ; are licensed and made available under the terms and conditions of the
> >> BSD License
> >> ; which accompanies this distribution. The full text of the license may be
> >> found at
> >> @@ -33,7 +33,7 @@
> >> ;------------------------------------------------------------------------------
> >> global ASM_PFX(InternalSyncDecrement)
> >> ASM_PFX(InternalSyncDecrement):
> >> - lock dec dword [rcx]
> >> - mov eax, [rcx]
> >> + mov eax, 0FFFFFFFFh
> >> + lock xadd dword [rcx], eax
> >> + dec eax
> >> ret
> >> -
> >> diff --git
> >> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
> >> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
> >> deleted file mode 100644
> >> index bbd1384602..0000000000
> >> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.c
> >> +++ /dev/null
> >> @@ -1,46 +0,0 @@
> >> -/** @file
> >> - InterLockedIncrement function
> >> -
> >> - Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
> >> - This program and the accompanying materials
> >> - are licensed and made available under the terms and conditions of the
> >> BSD License
> >> - which accompanies this distribution. The full text of the license may
> be
> >> found at
> >> - http://opensource.org/licenses/bsd-license.php.
> >> -
> >> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS
> IS"
> >> BASIS,
> >> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> >> EXPRESS OR IMPLIED.
> >> -
> >> -**/
> >> -
> >> -/**
> >> - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> >> -**/
> >> -
> >> -long _InterlockedIncrement(
> >> - long * lpAddend
> >> -);
> >> -
> >> -#pragma intrinsic(_InterlockedIncrement)
> >> -
> >> -/**
> >> - Performs an atomic increment of an 32-bit unsigned integer.
> >> -
> >> - Performs an atomic increment of the 32-bit unsigned integer specified
> by
> >> - Value and returns the incremented value. The increment operation
> must
> >> be
> >> - performed using MP safe mechanisms. The state of the return value is
> >> not
> >> - guaranteed to be MP safe.
> >> -
> >> - @param Value A pointer to the 32-bit value to increment.
> >> -
> >> - @return The incremented value.
> >> -
> >> -**/
> >> -UINT32
> >> -EFIAPI
> >> -InternalSyncIncrement (
> >> - IN volatile UINT32 *Value
> >> - )
> >> -{
> >> - return _InterlockedIncrement ((long *)(UINTN)(Value));
> >> -}
> >> -
> >> diff --git
> >>
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> >>
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> >> index 7f877b5774..77379d998e 100644
> >> ---
> >>
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> >> +++
> >>
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedIncrement.nasm
> >> @@ -33,7 +33,8 @@
> >> ;------------------------------------------------------------------------------
> >> global ASM_PFX(InternalSyncIncrement)
> >> ASM_PFX(InternalSyncIncrement):
> >> - lock inc dword [rcx]
> >> - mov eax, [rcx]
> >> + mov eax, 1
> >> + lock xadd dword [rcx], eax
> >> + inc eax
> >> ret
> >>
> >> --
> >> 2.16.1.windows.1
> >
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-10 10:06 [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value Ruiyu Ni
2018-09-10 11:37 ` Yao, Jiewen
@ 2018-09-10 16:38 ` Kinney, Michael D
2018-09-11 2:25 ` Ni, Ruiyu
1 sibling, 1 reply; 11+ messages in thread
From: Kinney, Michael D @ 2018-09-10 16:38 UTC (permalink / raw)
To: Ni, Ruiyu, edk2-devel@lists.01.org, Kinney, Michael D
Cc: Yao, Jiewen, Gao, Liming
Ray,
Why are we removing the use of intrinsics from
MSFT builds? We should keep those for more efficient
code generation if the intrinsic has the correct
behavior.
Thanks,
Mike
> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Monday, September 10, 2018 3:06 AM
> To: edk2-devel@lists.01.org
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> <liming.gao@intel.com>; Kinney, Michael D
> <michael.d.kinney@intel.com>
> Subject: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
>
> Today's InterlockedIncrement()/InterlockedDecrement()
> guarantees to
> perform atomic increment/decrement but doesn't guarantee
> the return
> value equals to the new value.
>
> The patch fixes the behavior to use "XADD" instruction
> to guarantee
> the return value equals to the new value.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> ---
> MdePkg/Include/Library/SynchronizationLib.h | 6
> +--
> .../BaseSynchronizationLib.inf | 18
> ++++-----
> .../BaseSynchronizationLibInternals.h | 6
> +--
> .../BaseSynchronizationLib/Ia32/GccInline.c | 18
> ++++-----
> .../Ia32/InterlockedDecrement.c | 42
> --------------------
> .../Ia32/InterlockedDecrement.nasm | 10
> ++---
> .../Ia32/InterlockedIncrement.c | 43
> --------------------
> .../Ia32/InterlockedIncrement.nasm | 7
> ++--
> .../BaseSynchronizationLib/Synchronization.c | 6
> +--
> .../BaseSynchronizationLib/SynchronizationGcc.c | 6
> +--
> .../BaseSynchronizationLib/SynchronizationMsc.c | 6
> +--
> .../Library/BaseSynchronizationLib/X64/GccInline.c | 19
> +++++----
> .../X64/InterlockedDecrement.c | 46
> ----------------------
> .../X64/InterlockedDecrement.nasm | 8
> ++--
> .../X64/InterlockedIncrement.c | 46
> ----------------------
> .../X64/InterlockedIncrement.nasm | 5
> ++-
> 16 files changed, 52 insertions(+), 240 deletions(-)
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe
> crement.c
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn
> crement.c
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec
> rement.c
> delete mode 100644
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc
> rement.c
>
> diff --git a/MdePkg/Include/Library/SynchronizationLib.h
> b/MdePkg/Include/Library/SynchronizationLib.h
> index da69f6ff5e..ce3bce04f5 100644
> --- a/MdePkg/Include/Library/SynchronizationLib.h
> +++ b/MdePkg/Include/Library/SynchronizationLib.h
> @@ -144,8 +144,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned
> integer specified by
> Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -166,8 +165,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> Value and returns the decremented value. The
> decrement operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLib.inf
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLib.inf
> index 0be1d4331f..b971cd138d 100755
> ---
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLib.inf
> +++
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLib.inf
> @@ -34,9 +34,9 @@ [Sources.IA32]
> Ia32/InterlockedCompareExchange64.c | MSFT
> Ia32/InterlockedCompareExchange32.c | MSFT
> Ia32/InterlockedCompareExchange16.c | MSFT
> - Ia32/InterlockedDecrement.c | MSFT
> - Ia32/InterlockedIncrement.c | MSFT
> - SynchronizationMsc.c | MSFT
> + Ia32/InterlockedDecrement.nasm | MSFT
> + Ia32/InterlockedIncrement.nasm | MSFT
> + SynchronizationMsc.c | MSFT
>
> Ia32/InterlockedCompareExchange64.nasm| INTEL
> Ia32/InterlockedCompareExchange32.nasm| INTEL
> @@ -54,17 +54,15 @@ [Sources.X64]
> X64/InterlockedCompareExchange64.c | MSFT
> X64/InterlockedCompareExchange32.c | MSFT
> X64/InterlockedCompareExchange16.c | MSFT
> + X64/InterlockedDecrement.nasm | MSFT
> + X64/InterlockedIncrement.nasm | MSFT
> + SynchronizationMsc.c | MSFT
>
> X64/InterlockedCompareExchange64.nasm| INTEL
> X64/InterlockedCompareExchange32.nasm| INTEL
> X64/InterlockedCompareExchange16.nasm| INTEL
> -
> - X64/InterlockedDecrement.c | MSFT
> - X64/InterlockedIncrement.c | MSFT
> - SynchronizationMsc.c | MSFT
> -
> - X64/InterlockedDecrement.nasm| INTEL
> - X64/InterlockedIncrement.nasm| INTEL
> + X64/InterlockedDecrement.nasm | INTEL
> + X64/InterlockedIncrement.nasm | INTEL
> Synchronization.c | INTEL
>
> Ia32/InternalGetSpinLockProperties.c | GCC
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLibInternals.h
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLibInternals.h
> index 37edd7c188..8c363a8585 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLibInternals.h
> +++
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> ionLibInternals.h
> @@ -27,8 +27,7 @@
>
> Performs an atomic increment of the 32-bit unsigned
> integer specified by
> Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to
> increment.
>
> @@ -47,8 +46,7 @@ InternalSyncIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> Value and returns the decrement value. The decrement
> operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to
> decrement.
>
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> index 4ab293f243..d82e0205f5 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> +++
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> @@ -20,8 +20,7 @@
>
> Performs an atomic increment of the 32-bit unsigned
> integer specified by
> Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to
> increment.
>
> @@ -37,9 +36,10 @@ InternalSyncIncrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> + "movl $1, %%eax \n\t"
> "lock \n\t"
> - "incl %2 \n\t"
> - "movl %2, %%eax "
> + "xadd %%eax, %2 \n\t"
> + "inc %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> @@ -57,8 +57,7 @@ InternalSyncIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> Value and returns the decremented value. The
> decrement operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to
> decrement.
>
> @@ -74,9 +73,10 @@ InternalSyncDecrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> - "lock \n\t"
> - "decl %2 \n\t"
> - "movl %2, %%eax "
> + "movl $-1, %%eax \n\t"
> + "lock \n\t"
> + "xadd %%eax, %2 \n\t"
> + "dec %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Decrement.c
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Decrement.c
> deleted file mode 100644
> index 354a0e7ab1..0000000000
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Decrement.c
> +++ /dev/null
> @@ -1,42 +0,0 @@
> -/** @file
> - InterlockedDecrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All
> rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and
> conditions of the BSD License
> - which accompanies this distribution. The full text
> of the license may be found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON
> AN "AS IS" BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
> EITHER EXPRESS OR IMPLIED.
> -
> -**/
> -
> -
> -
> -
> -/**
> - Performs an atomic decrement of an 32-bit unsigned
> integer.
> -
> - Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> - Value and returns the decrement value. The decrement
> operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to
> decrement.
> -
> - @return The decrement value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncDecrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - _asm {
> - mov eax, Value
> - lock dec dword ptr [eax]
> - mov eax, [eax]
> - }
> -}
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Decrement.nasm
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Decrement.nasm
> index 4c46041186..dd5a8de3ed 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Decrement.nasm
> +++
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Decrement.nasm
> @@ -1,6 +1,6 @@
> ;------------------------------------------------------
> ------------------------
> ;
> -; Copyright (c) 2006 - 2016, Intel Corporation. All
> rights reserved.<BR>
> +; Copyright (c) 2006 - 2018, Intel Corporation. All
> rights reserved.<BR>
> ; This program and the accompanying materials
> ; are licensed and made available under the terms and
> conditions of the BSD License
> ; which accompanies this distribution. The full text
> of the license may be found at
> @@ -32,8 +32,8 @@
> ;------------------------------------------------------
> ------------------------
> global ASM_PFX(InternalSyncDecrement)
> ASM_PFX(InternalSyncDecrement):
> - mov eax, [esp + 4]
> - lock dec dword [eax]
> - mov eax, [eax]
> + mov ecx, [esp + 4]
> + mov eax, 0FFFFFFFFh
> + lock xadd dword [ecx], eax
> + dec eax
> ret
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Increment.c
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Increment.c
> deleted file mode 100644
> index c61a550119..0000000000
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Increment.c
> +++ /dev/null
> @@ -1,43 +0,0 @@
> -/** @file
> - InterLockedIncrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All
> rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and
> conditions of the BSD License
> - which accompanies this distribution. The full text
> of the license may be found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON
> AN "AS IS" BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
> EITHER EXPRESS OR IMPLIED.
> -
> -**/
> -
> -
> -
> -
> -/**
> - Performs an atomic increment of an 32-bit unsigned
> integer.
> -
> - Performs an atomic increment of the 32-bit unsigned
> integer specified by
> - Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to
> increment.
> -
> - @return The incremented value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncIncrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - _asm {
> - mov eax, Value
> - lock inc dword ptr [eax]
> - mov eax, [eax]
> - }
> -}
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Increment.nasm
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Increment.nasm
> index 3902c73275..0677e4bf78 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Increment.nasm
> +++
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> Increment.nasm
> @@ -32,8 +32,9 @@
> ;------------------------------------------------------
> ------------------------
> global ASM_PFX(InternalSyncIncrement)
> ASM_PFX(InternalSyncIncrement):
> - mov eax, [esp + 4]
> - lock inc dword [eax]
> - mov eax, [eax]
> + mov ecx, [esp + 4]
> + mov eax, 1
> + lock xadd dword [ecx], eax
> + inc eax
> ret
>
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> c
> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> c
> index 76c5a1275c..0ab59ca702 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> c
> +++
> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> c
> @@ -231,8 +231,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned
> integer specified by
> Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -256,8 +255,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> Value and returns the decremented value. The
> decrement operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> cc.c
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> cc.c
> index 5ac548b19f..177739d3da 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> cc.c
> +++
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> cc.c
> @@ -247,8 +247,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned
> integer specified by
> Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -272,8 +271,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> Value and returns the decremented value. The
> decrement operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> sc.c
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> sc.c
> index e3298c8ab4..6ab2d71870 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> sc.c
> +++
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> sc.c
> @@ -249,8 +249,7 @@ ReleaseSpinLock (
>
> Performs an atomic increment of the 32-bit unsigned
> integer specified by
> Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> @@ -274,8 +273,7 @@ InterlockedIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> Value and returns the decremented value. The
> decrement operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> If Value is NULL, then ASSERT().
>
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> index 5224dd063f..4c4d6e3fc7 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> +++
> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> @@ -15,14 +15,12 @@
>
>
>
> -
> /**
> Performs an atomic increment of an 32-bit unsigned
> integer.
>
> Performs an atomic increment of the 32-bit unsigned
> integer specified by
> Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to
> increment.
>
> @@ -38,9 +36,10 @@ InternalSyncIncrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> + "movl $1, %%eax \n\t"
> "lock \n\t"
> - "incl %2 \n\t"
> - "mov %2, %%eax "
> + "xadd %%eax, %2 \n\t"
> + "inc %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> @@ -57,8 +56,7 @@ InternalSyncIncrement (
>
> Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> Value and returns the decremented value. The
> decrement operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> + performed using MP safe mechanisms.
>
> @param Value A pointer to the 32-bit value to
> decrement.
>
> @@ -74,9 +72,10 @@ InternalSyncDecrement (
> UINT32 Result;
>
> __asm__ __volatile__ (
> - "lock \n\t"
> - "decl %2 \n\t"
> - "mov %2, %%eax "
> + "movl $-1, %%eax \n\t"
> + "lock \n\t"
> + "xadd %%eax, %2 \n\t"
> + "dec %%eax "
> : "=a" (Result), // %0
> "=m" (*Value) // %1
> : "m" (*Value) // %2
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> ecrement.c
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> ecrement.c
> deleted file mode 100644
> index da402cd4c6..0000000000
> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> ecrement.c
> +++ /dev/null
> @@ -1,46 +0,0 @@
> -/** @file
> - InterlockedDecrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All
> rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and
> conditions of the BSD License
> - which accompanies this distribution. The full text
> of the license may be found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON
> AN "AS IS" BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
> EITHER EXPRESS OR IMPLIED.
> -
> -**/
> -
> -/**
> - Microsoft Visual Studio 7.1 Function Prototypes for
> I/O Intrinsics.
> -**/
> -
> -long _InterlockedDecrement(
> - long * lpAddend
> -);
> -
> -#pragma intrinsic(_InterlockedDecrement)
> -
> -/**
> - Performs an atomic decrement of an 32-bit unsigned
> integer.
> -
> - Performs an atomic decrement of the 32-bit unsigned
> integer specified by
> - Value and returns the decrement value. The decrement
> operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to
> decrement.
> -
> - @return The decrement value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncDecrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - return _InterlockedDecrement ((long
> *)(UINTN)(Value));
> -}
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> ecrement.nasm
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> ecrement.nasm
> index 60f43111fe..dabdca945e 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> ecrement.nasm
> +++
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> ecrement.nasm
> @@ -1,6 +1,6 @@
> ;------------------------------------------------------
> ------------------------
> ;
> -; Copyright (c) 2006 - 2016, Intel Corporation. All
> rights reserved.<BR>
> +; Copyright (c) 2006 - 2018, Intel Corporation. All
> rights reserved.<BR>
> ; This program and the accompanying materials
> ; are licensed and made available under the terms and
> conditions of the BSD License
> ; which accompanies this distribution. The full text
> of the license may be found at
> @@ -33,7 +33,7 @@
> ;------------------------------------------------------
> ------------------------
> global ASM_PFX(InternalSyncDecrement)
> ASM_PFX(InternalSyncDecrement):
> - lock dec dword [rcx]
> - mov eax, [rcx]
> + mov eax, 0FFFFFFFFh
> + lock xadd dword [rcx], eax
> + dec eax
> ret
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> ncrement.c
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> ncrement.c
> deleted file mode 100644
> index bbd1384602..0000000000
> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> ncrement.c
> +++ /dev/null
> @@ -1,46 +0,0 @@
> -/** @file
> - InterLockedIncrement function
> -
> - Copyright (c) 2006 - 2016, Intel Corporation. All
> rights reserved.<BR>
> - This program and the accompanying materials
> - are licensed and made available under the terms and
> conditions of the BSD License
> - which accompanies this distribution. The full text
> of the license may be found at
> - http://opensource.org/licenses/bsd-license.php.
> -
> - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON
> AN "AS IS" BASIS,
> - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND,
> EITHER EXPRESS OR IMPLIED.
> -
> -**/
> -
> -/**
> - Microsoft Visual Studio 7.1 Function Prototypes for
> I/O Intrinsics.
> -**/
> -
> -long _InterlockedIncrement(
> - long * lpAddend
> -);
> -
> -#pragma intrinsic(_InterlockedIncrement)
> -
> -/**
> - Performs an atomic increment of an 32-bit unsigned
> integer.
> -
> - Performs an atomic increment of the 32-bit unsigned
> integer specified by
> - Value and returns the incremented value. The
> increment operation must be
> - performed using MP safe mechanisms. The state of the
> return value is not
> - guaranteed to be MP safe.
> -
> - @param Value A pointer to the 32-bit value to
> increment.
> -
> - @return The incremented value.
> -
> -**/
> -UINT32
> -EFIAPI
> -InternalSyncIncrement (
> - IN volatile UINT32 *Value
> - )
> -{
> - return _InterlockedIncrement ((long
> *)(UINTN)(Value));
> -}
> -
> diff --git
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> ncrement.nasm
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> ncrement.nasm
> index 7f877b5774..77379d998e 100644
> ---
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> ncrement.nasm
> +++
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> ncrement.nasm
> @@ -33,7 +33,8 @@
> ;------------------------------------------------------
> ------------------------
> global ASM_PFX(InternalSyncIncrement)
> ASM_PFX(InternalSyncIncrement):
> - lock inc dword [rcx]
> - mov eax, [rcx]
> + mov eax, 1
> + lock xadd dword [rcx], eax
> + inc eax
> ret
>
> --
> 2.16.1.windows.1
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-10 16:38 ` Kinney, Michael D
@ 2018-09-11 2:25 ` Ni, Ruiyu
2018-09-11 2:26 ` Ni, Ruiyu
0 siblings, 1 reply; 11+ messages in thread
From: Ni, Ruiyu @ 2018-09-11 2:25 UTC (permalink / raw)
To: Kinney, Michael D, edk2-devel@lists.01.org; +Cc: Yao, Jiewen, Gao, Liming
The NASM does the exactly same as the MSFT intrinsic.
I'd like to remove them because I was almost lost in so many versions of Interlocked[De|In]crement.
I'd like to merge them to one version.
Thanks/Ray
> -----Original Message-----
> From: Kinney, Michael D
> Sent: Tuesday, September 11, 2018 12:39 AM
> To: Ni, Ruiyu <ruiyu.ni@intel.com>; edk2-devel@lists.01.org; Kinney, Michael
> D <michael.d.kinney@intel.com>
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> <liming.gao@intel.com>
> Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
>
> Ray,
>
> Why are we removing the use of intrinsics from MSFT builds? We should
> keep those for more efficient code generation if the intrinsic has the correct
> behavior.
>
> Thanks,
>
> Mike
>
> > -----Original Message-----
> > From: Ni, Ruiyu
> > Sent: Monday, September 10, 2018 3:06 AM
> > To: edk2-devel@lists.01.org
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > <liming.gao@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>
> > Subject: [PATCH] MdePkg/SynchronizationLib: fix
> > Interlocked[De|In]crement return value
> >
> > Today's InterlockedIncrement()/InterlockedDecrement()
> > guarantees to
> > perform atomic increment/decrement but doesn't guarantee the return
> > value equals to the new value.
> >
> > The patch fixes the behavior to use "XADD" instruction to guarantee
> > the return value equals to the new value.
> >
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > Cc: Liming Gao <liming.gao@intel.com>
> > Cc: Michael D Kinney <michael.d.kinney@intel.com>
> > ---
> > MdePkg/Include/Library/SynchronizationLib.h | 6
> > +--
> > .../BaseSynchronizationLib.inf | 18
> > ++++-----
> > .../BaseSynchronizationLibInternals.h | 6
> > +--
> > .../BaseSynchronizationLib/Ia32/GccInline.c | 18
> > ++++-----
> > .../Ia32/InterlockedDecrement.c | 42
> > --------------------
> > .../Ia32/InterlockedDecrement.nasm | 10
> > ++---
> > .../Ia32/InterlockedIncrement.c | 43
> > --------------------
> > .../Ia32/InterlockedIncrement.nasm | 7
> > ++--
> > .../BaseSynchronizationLib/Synchronization.c | 6
> > +--
> > .../BaseSynchronizationLib/SynchronizationGcc.c | 6
> > +--
> > .../BaseSynchronizationLib/SynchronizationMsc.c | 6
> > +--
> > .../Library/BaseSynchronizationLib/X64/GccInline.c | 19
> > +++++----
> > .../X64/InterlockedDecrement.c | 46
> > ----------------------
> > .../X64/InterlockedDecrement.nasm | 8
> > ++--
> > .../X64/InterlockedIncrement.c | 46
> > ----------------------
> > .../X64/InterlockedIncrement.nasm | 5
> > ++-
> > 16 files changed, 52 insertions(+), 240 deletions(-) delete mode
> > 100644 MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe
> > crement.c
> > delete mode 100644
> > MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn
> > crement.c
> > delete mode 100644
> > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec
> > rement.c
> > delete mode 100644
> > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc
> > rement.c
> >
> > diff --git a/MdePkg/Include/Library/SynchronizationLib.h
> > b/MdePkg/Include/Library/SynchronizationLib.h
> > index da69f6ff5e..ce3bce04f5 100644
> > --- a/MdePkg/Include/Library/SynchronizationLib.h
> > +++ b/MdePkg/Include/Library/SynchronizationLib.h
> > @@ -144,8 +144,7 @@ ReleaseSpinLock (
> >
> > Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > @@ -166,8 +165,7 @@ InterlockedIncrement (
> >
> > Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > Value and returns the decremented value. The decrement operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLib.inf
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLib.inf
> > index 0be1d4331f..b971cd138d 100755
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLib.inf
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLib.inf
> > @@ -34,9 +34,9 @@ [Sources.IA32]
> > Ia32/InterlockedCompareExchange64.c | MSFT
> > Ia32/InterlockedCompareExchange32.c | MSFT
> > Ia32/InterlockedCompareExchange16.c | MSFT
> > - Ia32/InterlockedDecrement.c | MSFT
> > - Ia32/InterlockedIncrement.c | MSFT
> > - SynchronizationMsc.c | MSFT
> > + Ia32/InterlockedDecrement.nasm | MSFT
> > + Ia32/InterlockedIncrement.nasm | MSFT SynchronizationMsc.c | MSFT
> >
> > Ia32/InterlockedCompareExchange64.nasm| INTEL
> > Ia32/InterlockedCompareExchange32.nasm| INTEL @@ -54,17 +54,15
> @@
> > [Sources.X64]
> > X64/InterlockedCompareExchange64.c | MSFT
> > X64/InterlockedCompareExchange32.c | MSFT
> > X64/InterlockedCompareExchange16.c | MSFT
> > + X64/InterlockedDecrement.nasm | MSFT
> X64/InterlockedIncrement.nasm
> > + | MSFT SynchronizationMsc.c | MSFT
> >
> > X64/InterlockedCompareExchange64.nasm| INTEL
> > X64/InterlockedCompareExchange32.nasm| INTEL
> > X64/InterlockedCompareExchange16.nasm| INTEL
> > -
> > - X64/InterlockedDecrement.c | MSFT
> > - X64/InterlockedIncrement.c | MSFT
> > - SynchronizationMsc.c | MSFT
> > -
> > - X64/InterlockedDecrement.nasm| INTEL
> > - X64/InterlockedIncrement.nasm| INTEL
> > + X64/InterlockedDecrement.nasm | INTEL
> > + X64/InterlockedIncrement.nasm | INTEL
> > Synchronization.c | INTEL
> >
> > Ia32/InternalGetSpinLockProperties.c | GCC diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLibInternals.h
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLibInternals.h
> > index 37edd7c188..8c363a8585 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLibInternals.h
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > ionLibInternals.h
> > @@ -27,8 +27,7 @@
> >
> > Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > @param Value A pointer to the 32-bit value to increment.
> >
> > @@ -47,8 +46,7 @@ InternalSyncIncrement (
> >
> > Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > Value and returns the decrement value. The decrement operation must
> > be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > @param Value A pointer to the 32-bit value to decrement.
> >
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > index 4ab293f243..d82e0205f5 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > @@ -20,8 +20,7 @@
> >
> > Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > @param Value A pointer to the 32-bit value to increment.
> >
> > @@ -37,9 +36,10 @@ InternalSyncIncrement (
> > UINT32 Result;
> >
> > __asm__ __volatile__ (
> > + "movl $1, %%eax \n\t"
> > "lock \n\t"
> > - "incl %2 \n\t"
> > - "movl %2, %%eax "
> > + "xadd %%eax, %2 \n\t"
> > + "inc %%eax "
> > : "=a" (Result), // %0
> > "=m" (*Value) // %1
> > : "m" (*Value) // %2
> > @@ -57,8 +57,7 @@ InternalSyncIncrement (
> >
> > Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > Value and returns the decremented value. The decrement operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > @param Value A pointer to the 32-bit value to decrement.
> >
> > @@ -74,9 +73,10 @@ InternalSyncDecrement (
> > UINT32 Result;
> >
> > __asm__ __volatile__ (
> > - "lock \n\t"
> > - "decl %2 \n\t"
> > - "movl %2, %%eax "
> > + "movl $-1, %%eax \n\t"
> > + "lock \n\t"
> > + "xadd %%eax, %2 \n\t"
> > + "dec %%eax "
> > : "=a" (Result), // %0
> > "=m" (*Value) // %1
> > : "m" (*Value) // %2
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Decrement.c
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Decrement.c
> > deleted file mode 100644
> > index 354a0e7ab1..0000000000
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Decrement.c
> > +++ /dev/null
> > @@ -1,42 +0,0 @@
> > -/** @file
> > - InterlockedDecrement function
> > -
> > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > reserved.<BR>
> > - This program and the accompanying materials
> > - are licensed and made available under the terms and conditions of
> > the BSD License
> > - which accompanies this distribution. The full text of the license
> > may be found at
> > - http://opensource.org/licenses/bsd-license.php.
> > -
> > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > BASIS,
> > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS
> > OR IMPLIED.
> > -
> > -**/
> > -
> > -
> > -
> > -
> > -/**
> > - Performs an atomic decrement of an 32-bit unsigned integer.
> > -
> > - Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > - Value and returns the decrement value. The decrement operation must
> > be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > -
> > - @param Value A pointer to the 32-bit value to decrement.
> > -
> > - @return The decrement value.
> > -
> > -**/
> > -UINT32
> > -EFIAPI
> > -InternalSyncDecrement (
> > - IN volatile UINT32 *Value
> > - )
> > -{
> > - _asm {
> > - mov eax, Value
> > - lock dec dword ptr [eax]
> > - mov eax, [eax]
> > - }
> > -}
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Decrement.nasm
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Decrement.nasm
> > index 4c46041186..dd5a8de3ed 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Decrement.nasm
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Decrement.nasm
> > @@ -1,6 +1,6 @@
> > ;------------------------------------------------------
> > ------------------------
> > ;
> > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > reserved.<BR>
> > +; Copyright (c) 2006 - 2018, Intel Corporation. All
> > rights reserved.<BR>
> > ; This program and the accompanying materials ; are licensed and
> > made available under the terms and conditions of the BSD License ;
> > which accompanies this distribution. The full text of the license may
> > be found at @@ -32,8 +32,8 @@
> > ;------------------------------------------------------
> > ------------------------
> > global ASM_PFX(InternalSyncDecrement)
> > ASM_PFX(InternalSyncDecrement):
> > - mov eax, [esp + 4]
> > - lock dec dword [eax]
> > - mov eax, [eax]
> > + mov ecx, [esp + 4]
> > + mov eax, 0FFFFFFFFh
> > + lock xadd dword [ecx], eax
> > + dec eax
> > ret
> > -
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Increment.c
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Increment.c
> > deleted file mode 100644
> > index c61a550119..0000000000
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Increment.c
> > +++ /dev/null
> > @@ -1,43 +0,0 @@
> > -/** @file
> > - InterLockedIncrement function
> > -
> > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > reserved.<BR>
> > - This program and the accompanying materials
> > - are licensed and made available under the terms and conditions of
> > the BSD License
> > - which accompanies this distribution. The full text of the license
> > may be found at
> > - http://opensource.org/licenses/bsd-license.php.
> > -
> > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > BASIS,
> > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS
> > OR IMPLIED.
> > -
> > -**/
> > -
> > -
> > -
> > -
> > -/**
> > - Performs an atomic increment of an 32-bit unsigned integer.
> > -
> > - Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > - Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > -
> > - @param Value A pointer to the 32-bit value to increment.
> > -
> > - @return The incremented value.
> > -
> > -**/
> > -UINT32
> > -EFIAPI
> > -InternalSyncIncrement (
> > - IN volatile UINT32 *Value
> > - )
> > -{
> > - _asm {
> > - mov eax, Value
> > - lock inc dword ptr [eax]
> > - mov eax, [eax]
> > - }
> > -}
> > -
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Increment.nasm
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Increment.nasm
> > index 3902c73275..0677e4bf78 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Increment.nasm
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > Increment.nasm
> > @@ -32,8 +32,9 @@
> > ;------------------------------------------------------
> > ------------------------
> > global ASM_PFX(InternalSyncIncrement)
> > ASM_PFX(InternalSyncIncrement):
> > - mov eax, [esp + 4]
> > - lock inc dword [eax]
> > - mov eax, [eax]
> > + mov ecx, [esp + 4]
> > + mov eax, 1
> > + lock xadd dword [ecx], eax
> > + inc eax
> > ret
> >
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > c
> > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > c
> > index 76c5a1275c..0ab59ca702 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > c
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > c
> > @@ -231,8 +231,7 @@ ReleaseSpinLock (
> >
> > Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > @@ -256,8 +255,7 @@ InterlockedIncrement (
> >
> > Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > Value and returns the decremented value. The decrement operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > cc.c
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > cc.c
> > index 5ac548b19f..177739d3da 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > cc.c
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > cc.c
> > @@ -247,8 +247,7 @@ ReleaseSpinLock (
> >
> > Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > @@ -272,8 +271,7 @@ InterlockedIncrement (
> >
> > Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > Value and returns the decremented value. The decrement operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > sc.c
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > sc.c
> > index e3298c8ab4..6ab2d71870 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > sc.c
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > sc.c
> > @@ -249,8 +249,7 @@ ReleaseSpinLock (
> >
> > Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > @@ -274,8 +273,7 @@ InterlockedIncrement (
> >
> > Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > Value and returns the decremented value. The decrement operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > If Value is NULL, then ASSERT().
> >
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > index 5224dd063f..4c4d6e3fc7 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > @@ -15,14 +15,12 @@
> >
> >
> >
> > -
> > /**
> > Performs an atomic increment of an 32-bit unsigned integer.
> >
> > Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > @param Value A pointer to the 32-bit value to increment.
> >
> > @@ -38,9 +36,10 @@ InternalSyncIncrement (
> > UINT32 Result;
> >
> > __asm__ __volatile__ (
> > + "movl $1, %%eax \n\t"
> > "lock \n\t"
> > - "incl %2 \n\t"
> > - "mov %2, %%eax "
> > + "xadd %%eax, %2 \n\t"
> > + "inc %%eax "
> > : "=a" (Result), // %0
> > "=m" (*Value) // %1
> > : "m" (*Value) // %2
> > @@ -57,8 +56,7 @@ InternalSyncIncrement (
> >
> > Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > Value and returns the decremented value. The decrement operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > + performed using MP safe mechanisms.
> >
> > @param Value A pointer to the 32-bit value to decrement.
> >
> > @@ -74,9 +72,10 @@ InternalSyncDecrement (
> > UINT32 Result;
> >
> > __asm__ __volatile__ (
> > - "lock \n\t"
> > - "decl %2 \n\t"
> > - "mov %2, %%eax "
> > + "movl $-1, %%eax \n\t"
> > + "lock \n\t"
> > + "xadd %%eax, %2 \n\t"
> > + "dec %%eax "
> > : "=a" (Result), // %0
> > "=m" (*Value) // %1
> > : "m" (*Value) // %2
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > ecrement.c
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > ecrement.c
> > deleted file mode 100644
> > index da402cd4c6..0000000000
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > ecrement.c
> > +++ /dev/null
> > @@ -1,46 +0,0 @@
> > -/** @file
> > - InterlockedDecrement function
> > -
> > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > reserved.<BR>
> > - This program and the accompanying materials
> > - are licensed and made available under the terms and conditions of
> > the BSD License
> > - which accompanies this distribution. The full text of the license
> > may be found at
> > - http://opensource.org/licenses/bsd-license.php.
> > -
> > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > BASIS,
> > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS
> > OR IMPLIED.
> > -
> > -**/
> > -
> > -/**
> > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> > -**/
> > -
> > -long _InterlockedDecrement(
> > - long * lpAddend
> > -);
> > -
> > -#pragma intrinsic(_InterlockedDecrement)
> > -
> > -/**
> > - Performs an atomic decrement of an 32-bit unsigned integer.
> > -
> > - Performs an atomic decrement of the 32-bit unsigned integer
> > specified by
> > - Value and returns the decrement value. The decrement operation must
> > be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > -
> > - @param Value A pointer to the 32-bit value to decrement.
> > -
> > - @return The decrement value.
> > -
> > -**/
> > -UINT32
> > -EFIAPI
> > -InternalSyncDecrement (
> > - IN volatile UINT32 *Value
> > - )
> > -{
> > - return _InterlockedDecrement ((long *)(UINTN)(Value)); -}
> > -
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > ecrement.nasm
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > ecrement.nasm
> > index 60f43111fe..dabdca945e 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > ecrement.nasm
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > ecrement.nasm
> > @@ -1,6 +1,6 @@
> > ;------------------------------------------------------
> > ------------------------
> > ;
> > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > reserved.<BR>
> > +; Copyright (c) 2006 - 2018, Intel Corporation. All
> > rights reserved.<BR>
> > ; This program and the accompanying materials ; are licensed and
> > made available under the terms and conditions of the BSD License ;
> > which accompanies this distribution. The full text of the license may
> > be found at @@ -33,7 +33,7 @@
> > ;------------------------------------------------------
> > ------------------------
> > global ASM_PFX(InternalSyncDecrement)
> > ASM_PFX(InternalSyncDecrement):
> > - lock dec dword [rcx]
> > - mov eax, [rcx]
> > + mov eax, 0FFFFFFFFh
> > + lock xadd dword [rcx], eax
> > + dec eax
> > ret
> > -
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > ncrement.c
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > ncrement.c
> > deleted file mode 100644
> > index bbd1384602..0000000000
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > ncrement.c
> > +++ /dev/null
> > @@ -1,46 +0,0 @@
> > -/** @file
> > - InterLockedIncrement function
> > -
> > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > reserved.<BR>
> > - This program and the accompanying materials
> > - are licensed and made available under the terms and conditions of
> > the BSD License
> > - which accompanies this distribution. The full text of the license
> > may be found at
> > - http://opensource.org/licenses/bsd-license.php.
> > -
> > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > BASIS,
> > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> EXPRESS
> > OR IMPLIED.
> > -
> > -**/
> > -
> > -/**
> > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> > -**/
> > -
> > -long _InterlockedIncrement(
> > - long * lpAddend
> > -);
> > -
> > -#pragma intrinsic(_InterlockedIncrement)
> > -
> > -/**
> > - Performs an atomic increment of an 32-bit unsigned integer.
> > -
> > - Performs an atomic increment of the 32-bit unsigned integer
> > specified by
> > - Value and returns the incremented value. The increment operation
> > must be
> > - performed using MP safe mechanisms. The state of the return value
> > is not
> > - guaranteed to be MP safe.
> > -
> > - @param Value A pointer to the 32-bit value to increment.
> > -
> > - @return The incremented value.
> > -
> > -**/
> > -UINT32
> > -EFIAPI
> > -InternalSyncIncrement (
> > - IN volatile UINT32 *Value
> > - )
> > -{
> > - return _InterlockedIncrement ((long *)(UINTN)(Value)); -}
> > -
> > diff --git
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > ncrement.nasm
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > ncrement.nasm
> > index 7f877b5774..77379d998e 100644
> > ---
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > ncrement.nasm
> > +++
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > ncrement.nasm
> > @@ -33,7 +33,8 @@
> > ;------------------------------------------------------
> > ------------------------
> > global ASM_PFX(InternalSyncIncrement)
> > ASM_PFX(InternalSyncIncrement):
> > - lock inc dword [rcx]
> > - mov eax, [rcx]
> > + mov eax, 1
> > + lock xadd dword [rcx], eax
> > + inc eax
> > ret
> >
> > --
> > 2.16.1.windows.1
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-11 2:25 ` Ni, Ruiyu
@ 2018-09-11 2:26 ` Ni, Ruiyu
2018-09-12 2:16 ` Ni, Ruiyu
0 siblings, 1 reply; 11+ messages in thread
From: Ni, Ruiyu @ 2018-09-11 2:26 UTC (permalink / raw)
To: Kinney, Michael D, 'edk2-devel@lists.01.org'
Cc: Yao, Jiewen, Gao, Liming
The reason I didn't remove the GCC version is because Liming told me that there is a XCODE issue which prevents using NASM for library.
Thanks/Ray
> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Tuesday, September 11, 2018 10:25 AM
> To: Kinney, Michael D <michael.d.kinney@intel.com>; edk2-
> devel@lists.01.org
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> <liming.gao@intel.com>
> Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
>
> The NASM does the exactly same as the MSFT intrinsic.
> I'd like to remove them because I was almost lost in so many versions of
> Interlocked[De|In]crement.
> I'd like to merge them to one version.
>
> Thanks/Ray
>
> > -----Original Message-----
> > From: Kinney, Michael D
> > Sent: Tuesday, September 11, 2018 12:39 AM
> > To: Ni, Ruiyu <ruiyu.ni@intel.com>; edk2-devel@lists.01.org; Kinney,
> > Michael D <michael.d.kinney@intel.com>
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > <liming.gao@intel.com>
> > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> > Interlocked[De|In]crement return value
> >
> > Ray,
> >
> > Why are we removing the use of intrinsics from MSFT builds? We should
> > keep those for more efficient code generation if the intrinsic has the
> > correct behavior.
> >
> > Thanks,
> >
> > Mike
> >
> > > -----Original Message-----
> > > From: Ni, Ruiyu
> > > Sent: Monday, September 10, 2018 3:06 AM
> > > To: edk2-devel@lists.01.org
> > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > > <liming.gao@intel.com>; Kinney, Michael D
> > > <michael.d.kinney@intel.com>
> > > Subject: [PATCH] MdePkg/SynchronizationLib: fix
> > > Interlocked[De|In]crement return value
> > >
> > > Today's InterlockedIncrement()/InterlockedDecrement()
> > > guarantees to
> > > perform atomic increment/decrement but doesn't guarantee the return
> > > value equals to the new value.
> > >
> > > The patch fixes the behavior to use "XADD" instruction to guarantee
> > > the return value equals to the new value.
> > >
> > > Contributed-under: TianoCore Contribution Agreement 1.1
> > > Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> > > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > > Cc: Liming Gao <liming.gao@intel.com>
> > > Cc: Michael D Kinney <michael.d.kinney@intel.com>
> > > ---
> > > MdePkg/Include/Library/SynchronizationLib.h | 6
> > > +--
> > > .../BaseSynchronizationLib.inf | 18
> > > ++++-----
> > > .../BaseSynchronizationLibInternals.h | 6
> > > +--
> > > .../BaseSynchronizationLib/Ia32/GccInline.c | 18
> > > ++++-----
> > > .../Ia32/InterlockedDecrement.c | 42
> > > --------------------
> > > .../Ia32/InterlockedDecrement.nasm | 10
> > > ++---
> > > .../Ia32/InterlockedIncrement.c | 43
> > > --------------------
> > > .../Ia32/InterlockedIncrement.nasm | 7
> > > ++--
> > > .../BaseSynchronizationLib/Synchronization.c | 6
> > > +--
> > > .../BaseSynchronizationLib/SynchronizationGcc.c | 6
> > > +--
> > > .../BaseSynchronizationLib/SynchronizationMsc.c | 6
> > > +--
> > > .../Library/BaseSynchronizationLib/X64/GccInline.c | 19
> > > +++++----
> > > .../X64/InterlockedDecrement.c | 46
> > > ----------------------
> > > .../X64/InterlockedDecrement.nasm | 8
> > > ++--
> > > .../X64/InterlockedIncrement.c | 46
> > > ----------------------
> > > .../X64/InterlockedIncrement.nasm | 5
> > > ++-
> > > 16 files changed, 52 insertions(+), 240 deletions(-) delete mode
> > > 100644 MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe
> > > crement.c
> > > delete mode 100644
> > > MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn
> > > crement.c
> > > delete mode 100644
> > > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec
> > > rement.c
> > > delete mode 100644
> > > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc
> > > rement.c
> > >
> > > diff --git a/MdePkg/Include/Library/SynchronizationLib.h
> > > b/MdePkg/Include/Library/SynchronizationLib.h
> > > index da69f6ff5e..ce3bce04f5 100644
> > > --- a/MdePkg/Include/Library/SynchronizationLib.h
> > > +++ b/MdePkg/Include/Library/SynchronizationLib.h
> > > @@ -144,8 +144,7 @@ ReleaseSpinLock (
> > >
> > > Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > @@ -166,8 +165,7 @@ InterlockedIncrement (
> > >
> > > Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the decremented value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLib.inf
> > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLib.inf
> > > index 0be1d4331f..b971cd138d 100755
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLib.inf
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLib.inf
> > > @@ -34,9 +34,9 @@ [Sources.IA32]
> > > Ia32/InterlockedCompareExchange64.c | MSFT
> > > Ia32/InterlockedCompareExchange32.c | MSFT
> > > Ia32/InterlockedCompareExchange16.c | MSFT
> > > - Ia32/InterlockedDecrement.c | MSFT
> > > - Ia32/InterlockedIncrement.c | MSFT
> > > - SynchronizationMsc.c | MSFT
> > > + Ia32/InterlockedDecrement.nasm | MSFT
> > > + Ia32/InterlockedIncrement.nasm | MSFT SynchronizationMsc.c | MSFT
> > >
> > > Ia32/InterlockedCompareExchange64.nasm| INTEL
> > > Ia32/InterlockedCompareExchange32.nasm| INTEL @@ -54,17 +54,15
> > @@
> > > [Sources.X64]
> > > X64/InterlockedCompareExchange64.c | MSFT
> > > X64/InterlockedCompareExchange32.c | MSFT
> > > X64/InterlockedCompareExchange16.c | MSFT
> > > + X64/InterlockedDecrement.nasm | MSFT
> > X64/InterlockedIncrement.nasm
> > > + | MSFT SynchronizationMsc.c | MSFT
> > >
> > > X64/InterlockedCompareExchange64.nasm| INTEL
> > > X64/InterlockedCompareExchange32.nasm| INTEL
> > > X64/InterlockedCompareExchange16.nasm| INTEL
> > > -
> > > - X64/InterlockedDecrement.c | MSFT
> > > - X64/InterlockedIncrement.c | MSFT
> > > - SynchronizationMsc.c | MSFT
> > > -
> > > - X64/InterlockedDecrement.nasm| INTEL
> > > - X64/InterlockedIncrement.nasm| INTEL
> > > + X64/InterlockedDecrement.nasm | INTEL
> > > + X64/InterlockedIncrement.nasm | INTEL
> > > Synchronization.c | INTEL
> > >
> > > Ia32/InternalGetSpinLockProperties.c | GCC diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLibInternals.h
> > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLibInternals.h
> > > index 37edd7c188..8c363a8585 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLibInternals.h
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > ionLibInternals.h
> > > @@ -27,8 +27,7 @@
> > >
> > > Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > @param Value A pointer to the 32-bit value to increment.
> > >
> > > @@ -47,8 +46,7 @@ InternalSyncIncrement (
> > >
> > > Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the decrement value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > @param Value A pointer to the 32-bit value to decrement.
> > >
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > index 4ab293f243..d82e0205f5 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > @@ -20,8 +20,7 @@
> > >
> > > Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > @param Value A pointer to the 32-bit value to increment.
> > >
> > > @@ -37,9 +36,10 @@ InternalSyncIncrement (
> > > UINT32 Result;
> > >
> > > __asm__ __volatile__ (
> > > + "movl $1, %%eax \n\t"
> > > "lock \n\t"
> > > - "incl %2 \n\t"
> > > - "movl %2, %%eax "
> > > + "xadd %%eax, %2 \n\t"
> > > + "inc %%eax "
> > > : "=a" (Result), // %0
> > > "=m" (*Value) // %1
> > > : "m" (*Value) // %2
> > > @@ -57,8 +57,7 @@ InternalSyncIncrement (
> > >
> > > Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the decremented value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > @param Value A pointer to the 32-bit value to decrement.
> > >
> > > @@ -74,9 +73,10 @@ InternalSyncDecrement (
> > > UINT32 Result;
> > >
> > > __asm__ __volatile__ (
> > > - "lock \n\t"
> > > - "decl %2 \n\t"
> > > - "movl %2, %%eax "
> > > + "movl $-1, %%eax \n\t"
> > > + "lock \n\t"
> > > + "xadd %%eax, %2 \n\t"
> > > + "dec %%eax "
> > > : "=a" (Result), // %0
> > > "=m" (*Value) // %1
> > > : "m" (*Value) // %2
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Decrement.c
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Decrement.c
> > > deleted file mode 100644
> > > index 354a0e7ab1..0000000000
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Decrement.c
> > > +++ /dev/null
> > > @@ -1,42 +0,0 @@
> > > -/** @file
> > > - InterlockedDecrement function
> > > -
> > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > reserved.<BR>
> > > - This program and the accompanying materials
> > > - are licensed and made available under the terms and conditions of
> > > the BSD License
> > > - which accompanies this distribution. The full text of the
> > > license may be found at
> > > - http://opensource.org/licenses/bsd-license.php.
> > > -
> > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > BASIS,
> > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > EXPRESS
> > > OR IMPLIED.
> > > -
> > > -**/
> > > -
> > > -
> > > -
> > > -
> > > -/**
> > > - Performs an atomic decrement of an 32-bit unsigned integer.
> > > -
> > > - Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > - Value and returns the decrement value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > -
> > > - @param Value A pointer to the 32-bit value to decrement.
> > > -
> > > - @return The decrement value.
> > > -
> > > -**/
> > > -UINT32
> > > -EFIAPI
> > > -InternalSyncDecrement (
> > > - IN volatile UINT32 *Value
> > > - )
> > > -{
> > > - _asm {
> > > - mov eax, Value
> > > - lock dec dword ptr [eax]
> > > - mov eax, [eax]
> > > - }
> > > -}
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Decrement.nasm
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Decrement.nasm
> > > index 4c46041186..dd5a8de3ed 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Decrement.nasm
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Decrement.nasm
> > > @@ -1,6 +1,6 @@
> > > ;------------------------------------------------------
> > > ------------------------
> > > ;
> > > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > reserved.<BR>
> > > +; Copyright (c) 2006 - 2018, Intel Corporation. All
> > > rights reserved.<BR>
> > > ; This program and the accompanying materials ; are licensed and
> > > made available under the terms and conditions of the BSD License ;
> > > which accompanies this distribution. The full text of the license
> > > may be found at @@ -32,8 +32,8 @@
> > > ;------------------------------------------------------
> > > ------------------------
> > > global ASM_PFX(InternalSyncDecrement)
> > > ASM_PFX(InternalSyncDecrement):
> > > - mov eax, [esp + 4]
> > > - lock dec dword [eax]
> > > - mov eax, [eax]
> > > + mov ecx, [esp + 4]
> > > + mov eax, 0FFFFFFFFh
> > > + lock xadd dword [ecx], eax
> > > + dec eax
> > > ret
> > > -
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Increment.c
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Increment.c
> > > deleted file mode 100644
> > > index c61a550119..0000000000
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Increment.c
> > > +++ /dev/null
> > > @@ -1,43 +0,0 @@
> > > -/** @file
> > > - InterLockedIncrement function
> > > -
> > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > reserved.<BR>
> > > - This program and the accompanying materials
> > > - are licensed and made available under the terms and conditions of
> > > the BSD License
> > > - which accompanies this distribution. The full text of the
> > > license may be found at
> > > - http://opensource.org/licenses/bsd-license.php.
> > > -
> > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > BASIS,
> > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > EXPRESS
> > > OR IMPLIED.
> > > -
> > > -**/
> > > -
> > > -
> > > -
> > > -
> > > -/**
> > > - Performs an atomic increment of an 32-bit unsigned integer.
> > > -
> > > - Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > - Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > -
> > > - @param Value A pointer to the 32-bit value to increment.
> > > -
> > > - @return The incremented value.
> > > -
> > > -**/
> > > -UINT32
> > > -EFIAPI
> > > -InternalSyncIncrement (
> > > - IN volatile UINT32 *Value
> > > - )
> > > -{
> > > - _asm {
> > > - mov eax, Value
> > > - lock inc dword ptr [eax]
> > > - mov eax, [eax]
> > > - }
> > > -}
> > > -
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Increment.nasm
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Increment.nasm
> > > index 3902c73275..0677e4bf78 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Increment.nasm
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > Increment.nasm
> > > @@ -32,8 +32,9 @@
> > > ;------------------------------------------------------
> > > ------------------------
> > > global ASM_PFX(InternalSyncIncrement)
> > > ASM_PFX(InternalSyncIncrement):
> > > - mov eax, [esp + 4]
> > > - lock inc dword [eax]
> > > - mov eax, [eax]
> > > + mov ecx, [esp + 4]
> > > + mov eax, 1
> > > + lock xadd dword [ecx], eax
> > > + inc eax
> > > ret
> > >
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > c
> > > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > c
> > > index 76c5a1275c..0ab59ca702 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > c
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > c
> > > @@ -231,8 +231,7 @@ ReleaseSpinLock (
> > >
> > > Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > @@ -256,8 +255,7 @@ InterlockedIncrement (
> > >
> > > Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the decremented value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > cc.c
> > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > cc.c
> > > index 5ac548b19f..177739d3da 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > cc.c
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > cc.c
> > > @@ -247,8 +247,7 @@ ReleaseSpinLock (
> > >
> > > Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > @@ -272,8 +271,7 @@ InterlockedIncrement (
> > >
> > > Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the decremented value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > sc.c
> > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > sc.c
> > > index e3298c8ab4..6ab2d71870 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > sc.c
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > sc.c
> > > @@ -249,8 +249,7 @@ ReleaseSpinLock (
> > >
> > > Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > @@ -274,8 +273,7 @@ InterlockedIncrement (
> > >
> > > Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the decremented value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > If Value is NULL, then ASSERT().
> > >
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > index 5224dd063f..4c4d6e3fc7 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > @@ -15,14 +15,12 @@
> > >
> > >
> > >
> > > -
> > > /**
> > > Performs an atomic increment of an 32-bit unsigned integer.
> > >
> > > Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > @param Value A pointer to the 32-bit value to increment.
> > >
> > > @@ -38,9 +36,10 @@ InternalSyncIncrement (
> > > UINT32 Result;
> > >
> > > __asm__ __volatile__ (
> > > + "movl $1, %%eax \n\t"
> > > "lock \n\t"
> > > - "incl %2 \n\t"
> > > - "mov %2, %%eax "
> > > + "xadd %%eax, %2 \n\t"
> > > + "inc %%eax "
> > > : "=a" (Result), // %0
> > > "=m" (*Value) // %1
> > > : "m" (*Value) // %2
> > > @@ -57,8 +56,7 @@ InternalSyncIncrement (
> > >
> > > Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > Value and returns the decremented value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > + performed using MP safe mechanisms.
> > >
> > > @param Value A pointer to the 32-bit value to decrement.
> > >
> > > @@ -74,9 +72,10 @@ InternalSyncDecrement (
> > > UINT32 Result;
> > >
> > > __asm__ __volatile__ (
> > > - "lock \n\t"
> > > - "decl %2 \n\t"
> > > - "mov %2, %%eax "
> > > + "movl $-1, %%eax \n\t"
> > > + "lock \n\t"
> > > + "xadd %%eax, %2 \n\t"
> > > + "dec %%eax "
> > > : "=a" (Result), // %0
> > > "=m" (*Value) // %1
> > > : "m" (*Value) // %2
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > ecrement.c
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > ecrement.c
> > > deleted file mode 100644
> > > index da402cd4c6..0000000000
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > ecrement.c
> > > +++ /dev/null
> > > @@ -1,46 +0,0 @@
> > > -/** @file
> > > - InterlockedDecrement function
> > > -
> > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > reserved.<BR>
> > > - This program and the accompanying materials
> > > - are licensed and made available under the terms and conditions of
> > > the BSD License
> > > - which accompanies this distribution. The full text of the
> > > license may be found at
> > > - http://opensource.org/licenses/bsd-license.php.
> > > -
> > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > BASIS,
> > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > EXPRESS
> > > OR IMPLIED.
> > > -
> > > -**/
> > > -
> > > -/**
> > > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> > > -**/
> > > -
> > > -long _InterlockedDecrement(
> > > - long * lpAddend
> > > -);
> > > -
> > > -#pragma intrinsic(_InterlockedDecrement)
> > > -
> > > -/**
> > > - Performs an atomic decrement of an 32-bit unsigned integer.
> > > -
> > > - Performs an atomic decrement of the 32-bit unsigned integer
> > > specified by
> > > - Value and returns the decrement value. The decrement operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > -
> > > - @param Value A pointer to the 32-bit value to decrement.
> > > -
> > > - @return The decrement value.
> > > -
> > > -**/
> > > -UINT32
> > > -EFIAPI
> > > -InternalSyncDecrement (
> > > - IN volatile UINT32 *Value
> > > - )
> > > -{
> > > - return _InterlockedDecrement ((long *)(UINTN)(Value)); -}
> > > -
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > ecrement.nasm
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > ecrement.nasm
> > > index 60f43111fe..dabdca945e 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > ecrement.nasm
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > ecrement.nasm
> > > @@ -1,6 +1,6 @@
> > > ;------------------------------------------------------
> > > ------------------------
> > > ;
> > > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > reserved.<BR>
> > > +; Copyright (c) 2006 - 2018, Intel Corporation. All
> > > rights reserved.<BR>
> > > ; This program and the accompanying materials ; are licensed and
> > > made available under the terms and conditions of the BSD License ;
> > > which accompanies this distribution. The full text of the license
> > > may be found at @@ -33,7 +33,7 @@
> > > ;------------------------------------------------------
> > > ------------------------
> > > global ASM_PFX(InternalSyncDecrement)
> > > ASM_PFX(InternalSyncDecrement):
> > > - lock dec dword [rcx]
> > > - mov eax, [rcx]
> > > + mov eax, 0FFFFFFFFh
> > > + lock xadd dword [rcx], eax
> > > + dec eax
> > > ret
> > > -
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > ncrement.c
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > ncrement.c
> > > deleted file mode 100644
> > > index bbd1384602..0000000000
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > ncrement.c
> > > +++ /dev/null
> > > @@ -1,46 +0,0 @@
> > > -/** @file
> > > - InterLockedIncrement function
> > > -
> > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > reserved.<BR>
> > > - This program and the accompanying materials
> > > - are licensed and made available under the terms and conditions of
> > > the BSD License
> > > - which accompanies this distribution. The full text of the
> > > license may be found at
> > > - http://opensource.org/licenses/bsd-license.php.
> > > -
> > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > BASIS,
> > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > EXPRESS
> > > OR IMPLIED.
> > > -
> > > -**/
> > > -
> > > -/**
> > > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> > > -**/
> > > -
> > > -long _InterlockedIncrement(
> > > - long * lpAddend
> > > -);
> > > -
> > > -#pragma intrinsic(_InterlockedIncrement)
> > > -
> > > -/**
> > > - Performs an atomic increment of an 32-bit unsigned integer.
> > > -
> > > - Performs an atomic increment of the 32-bit unsigned integer
> > > specified by
> > > - Value and returns the incremented value. The increment operation
> > > must be
> > > - performed using MP safe mechanisms. The state of the return value
> > > is not
> > > - guaranteed to be MP safe.
> > > -
> > > - @param Value A pointer to the 32-bit value to increment.
> > > -
> > > - @return The incremented value.
> > > -
> > > -**/
> > > -UINT32
> > > -EFIAPI
> > > -InternalSyncIncrement (
> > > - IN volatile UINT32 *Value
> > > - )
> > > -{
> > > - return _InterlockedIncrement ((long *)(UINTN)(Value)); -}
> > > -
> > > diff --git
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > ncrement.nasm
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > ncrement.nasm
> > > index 7f877b5774..77379d998e 100644
> > > ---
> > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > ncrement.nasm
> > > +++
> > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > ncrement.nasm
> > > @@ -33,7 +33,8 @@
> > > ;------------------------------------------------------
> > > ------------------------
> > > global ASM_PFX(InternalSyncIncrement)
> > > ASM_PFX(InternalSyncIncrement):
> > > - lock inc dword [rcx]
> > > - mov eax, [rcx]
> > > + mov eax, 1
> > > + lock xadd dword [rcx], eax
> > > + inc eax
> > > ret
> > >
> > > --
> > > 2.16.1.windows.1
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-11 2:26 ` Ni, Ruiyu
@ 2018-09-12 2:16 ` Ni, Ruiyu
2018-09-12 14:53 ` Kinney, Michael D
0 siblings, 1 reply; 11+ messages in thread
From: Ni, Ruiyu @ 2018-09-12 2:16 UTC (permalink / raw)
To: Ni, Ruiyu, Kinney, Michael D, 'edk2-devel@lists.01.org'
Cc: Yao, Jiewen, Gao, Liming
Mike,
Do you require to still use MSVC intrinsic function?
> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Ni,
> Ruiyu
> Sent: Tuesday, September 11, 2018 10:27 AM
> To: Kinney, Michael D <michael.d.kinney@intel.com>; 'edk2-devel@lists.01.org'
> <edk2-devel@lists.01.org>
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming <liming.gao@intel.com>
> Subject: Re: [edk2] [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
>
> The reason I didn't remove the GCC version is because Liming told me that there
> is a XCODE issue which prevents using NASM for library.
>
> Thanks/Ray
>
> > -----Original Message-----
> > From: Ni, Ruiyu
> > Sent: Tuesday, September 11, 2018 10:25 AM
> > To: Kinney, Michael D <michael.d.kinney@intel.com>; edk2-
> > devel@lists.01.org
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > <liming.gao@intel.com>
> > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> > Interlocked[De|In]crement return value
> >
> > The NASM does the exactly same as the MSFT intrinsic.
> > I'd like to remove them because I was almost lost in so many versions
> > of Interlocked[De|In]crement.
> > I'd like to merge them to one version.
> >
> > Thanks/Ray
> >
> > > -----Original Message-----
> > > From: Kinney, Michael D
> > > Sent: Tuesday, September 11, 2018 12:39 AM
> > > To: Ni, Ruiyu <ruiyu.ni@intel.com>; edk2-devel@lists.01.org; Kinney,
> > > Michael D <michael.d.kinney@intel.com>
> > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > > <liming.gao@intel.com>
> > > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> > > Interlocked[De|In]crement return value
> > >
> > > Ray,
> > >
> > > Why are we removing the use of intrinsics from MSFT builds? We
> > > should keep those for more efficient code generation if the
> > > intrinsic has the correct behavior.
> > >
> > > Thanks,
> > >
> > > Mike
> > >
> > > > -----Original Message-----
> > > > From: Ni, Ruiyu
> > > > Sent: Monday, September 10, 2018 3:06 AM
> > > > To: edk2-devel@lists.01.org
> > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > > > <liming.gao@intel.com>; Kinney, Michael D
> > > > <michael.d.kinney@intel.com>
> > > > Subject: [PATCH] MdePkg/SynchronizationLib: fix
> > > > Interlocked[De|In]crement return value
> > > >
> > > > Today's InterlockedIncrement()/InterlockedDecrement()
> > > > guarantees to
> > > > perform atomic increment/decrement but doesn't guarantee the
> > > > return value equals to the new value.
> > > >
> > > > The patch fixes the behavior to use "XADD" instruction to
> > > > guarantee the return value equals to the new value.
> > > >
> > > > Contributed-under: TianoCore Contribution Agreement 1.1
> > > > Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> > > > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > > > Cc: Liming Gao <liming.gao@intel.com>
> > > > Cc: Michael D Kinney <michael.d.kinney@intel.com>
> > > > ---
> > > > MdePkg/Include/Library/SynchronizationLib.h | 6
> > > > +--
> > > > .../BaseSynchronizationLib.inf | 18
> > > > ++++-----
> > > > .../BaseSynchronizationLibInternals.h | 6
> > > > +--
> > > > .../BaseSynchronizationLib/Ia32/GccInline.c | 18
> > > > ++++-----
> > > > .../Ia32/InterlockedDecrement.c | 42
> > > > --------------------
> > > > .../Ia32/InterlockedDecrement.nasm | 10
> > > > ++---
> > > > .../Ia32/InterlockedIncrement.c | 43
> > > > --------------------
> > > > .../Ia32/InterlockedIncrement.nasm | 7
> > > > ++--
> > > > .../BaseSynchronizationLib/Synchronization.c | 6
> > > > +--
> > > > .../BaseSynchronizationLib/SynchronizationGcc.c | 6
> > > > +--
> > > > .../BaseSynchronizationLib/SynchronizationMsc.c | 6
> > > > +--
> > > > .../Library/BaseSynchronizationLib/X64/GccInline.c | 19
> > > > +++++----
> > > > .../X64/InterlockedDecrement.c | 46
> > > > ----------------------
> > > > .../X64/InterlockedDecrement.nasm | 8
> > > > ++--
> > > > .../X64/InterlockedIncrement.c | 46
> > > > ----------------------
> > > > .../X64/InterlockedIncrement.nasm | 5
> > > > ++-
> > > > 16 files changed, 52 insertions(+), 240 deletions(-) delete mode
> > > > 100644 MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe
> > > > crement.c
> > > > delete mode 100644
> > > > MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn
> > > > crement.c
> > > > delete mode 100644
> > > > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec
> > > > rement.c
> > > > delete mode 100644
> > > > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc
> > > > rement.c
> > > >
> > > > diff --git a/MdePkg/Include/Library/SynchronizationLib.h
> > > > b/MdePkg/Include/Library/SynchronizationLib.h
> > > > index da69f6ff5e..ce3bce04f5 100644
> > > > --- a/MdePkg/Include/Library/SynchronizationLib.h
> > > > +++ b/MdePkg/Include/Library/SynchronizationLib.h
> > > > @@ -144,8 +144,7 @@ ReleaseSpinLock (
> > > >
> > > > Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > @@ -166,8 +165,7 @@ InterlockedIncrement (
> > > >
> > > > Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the decremented value. The decrement
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLib.inf
> > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLib.inf
> > > > index 0be1d4331f..b971cd138d 100755
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLib.inf
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLib.inf
> > > > @@ -34,9 +34,9 @@ [Sources.IA32]
> > > > Ia32/InterlockedCompareExchange64.c | MSFT
> > > > Ia32/InterlockedCompareExchange32.c | MSFT
> > > > Ia32/InterlockedCompareExchange16.c | MSFT
> > > > - Ia32/InterlockedDecrement.c | MSFT
> > > > - Ia32/InterlockedIncrement.c | MSFT
> > > > - SynchronizationMsc.c | MSFT
> > > > + Ia32/InterlockedDecrement.nasm | MSFT
> > > > + Ia32/InterlockedIncrement.nasm | MSFT SynchronizationMsc.c |
> > > > + MSFT
> > > >
> > > > Ia32/InterlockedCompareExchange64.nasm| INTEL
> > > > Ia32/InterlockedCompareExchange32.nasm| INTEL @@ -54,17 +54,15
> > > @@
> > > > [Sources.X64]
> > > > X64/InterlockedCompareExchange64.c | MSFT
> > > > X64/InterlockedCompareExchange32.c | MSFT
> > > > X64/InterlockedCompareExchange16.c | MSFT
> > > > + X64/InterlockedDecrement.nasm | MSFT
> > > X64/InterlockedIncrement.nasm
> > > > + | MSFT SynchronizationMsc.c | MSFT
> > > >
> > > > X64/InterlockedCompareExchange64.nasm| INTEL
> > > > X64/InterlockedCompareExchange32.nasm| INTEL
> > > > X64/InterlockedCompareExchange16.nasm| INTEL
> > > > -
> > > > - X64/InterlockedDecrement.c | MSFT
> > > > - X64/InterlockedIncrement.c | MSFT
> > > > - SynchronizationMsc.c | MSFT
> > > > -
> > > > - X64/InterlockedDecrement.nasm| INTEL
> > > > - X64/InterlockedIncrement.nasm| INTEL
> > > > + X64/InterlockedDecrement.nasm | INTEL
> > > > + X64/InterlockedIncrement.nasm | INTEL
> > > > Synchronization.c | INTEL
> > > >
> > > > Ia32/InternalGetSpinLockProperties.c | GCC diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLibInternals.h
> > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLibInternals.h
> > > > index 37edd7c188..8c363a8585 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLibInternals.h
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > ionLibInternals.h
> > > > @@ -27,8 +27,7 @@
> > > >
> > > > Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > @param Value A pointer to the 32-bit value to increment.
> > > >
> > > > @@ -47,8 +46,7 @@ InternalSyncIncrement (
> > > >
> > > > Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the decrement value. The decrement operation
> > > > must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > @param Value A pointer to the 32-bit value to decrement.
> > > >
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > index 4ab293f243..d82e0205f5 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > @@ -20,8 +20,7 @@
> > > >
> > > > Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > @param Value A pointer to the 32-bit value to increment.
> > > >
> > > > @@ -37,9 +36,10 @@ InternalSyncIncrement (
> > > > UINT32 Result;
> > > >
> > > > __asm__ __volatile__ (
> > > > + "movl $1, %%eax \n\t"
> > > > "lock \n\t"
> > > > - "incl %2 \n\t"
> > > > - "movl %2, %%eax "
> > > > + "xadd %%eax, %2 \n\t"
> > > > + "inc %%eax "
> > > > : "=a" (Result), // %0
> > > > "=m" (*Value) // %1
> > > > : "m" (*Value) // %2
> > > > @@ -57,8 +57,7 @@ InternalSyncIncrement (
> > > >
> > > > Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the decremented value. The decrement
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > @param Value A pointer to the 32-bit value to decrement.
> > > >
> > > > @@ -74,9 +73,10 @@ InternalSyncDecrement (
> > > > UINT32 Result;
> > > >
> > > > __asm__ __volatile__ (
> > > > - "lock \n\t"
> > > > - "decl %2 \n\t"
> > > > - "movl %2, %%eax "
> > > > + "movl $-1, %%eax \n\t"
> > > > + "lock \n\t"
> > > > + "xadd %%eax, %2 \n\t"
> > > > + "dec %%eax "
> > > > : "=a" (Result), // %0
> > > > "=m" (*Value) // %1
> > > > : "m" (*Value) // %2
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Decrement.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Decrement.c
> > > > deleted file mode 100644
> > > > index 354a0e7ab1..0000000000
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Decrement.c
> > > > +++ /dev/null
> > > > @@ -1,42 +0,0 @@
> > > > -/** @file
> > > > - InterlockedDecrement function
> > > > -
> > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > > reserved.<BR>
> > > > - This program and the accompanying materials
> > > > - are licensed and made available under the terms and conditions
> > > > of the BSD License
> > > > - which accompanies this distribution. The full text of the
> > > > license may be found at
> > > > - http://opensource.org/licenses/bsd-license.php.
> > > > -
> > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > > BASIS,
> > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > > EXPRESS
> > > > OR IMPLIED.
> > > > -
> > > > -**/
> > > > -
> > > > -
> > > > -
> > > > -
> > > > -/**
> > > > - Performs an atomic decrement of an 32-bit unsigned integer.
> > > > -
> > > > - Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > - Value and returns the decrement value. The decrement operation
> > > > must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > -
> > > > - @param Value A pointer to the 32-bit value to decrement.
> > > > -
> > > > - @return The decrement value.
> > > > -
> > > > -**/
> > > > -UINT32
> > > > -EFIAPI
> > > > -InternalSyncDecrement (
> > > > - IN volatile UINT32 *Value
> > > > - )
> > > > -{
> > > > - _asm {
> > > > - mov eax, Value
> > > > - lock dec dword ptr [eax]
> > > > - mov eax, [eax]
> > > > - }
> > > > -}
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Decrement.nasm
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Decrement.nasm
> > > > index 4c46041186..dd5a8de3ed 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Decrement.nasm
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Decrement.nasm
> > > > @@ -1,6 +1,6 @@
> > > > ;------------------------------------------------------
> > > > ------------------------
> > > > ;
> > > > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > > reserved.<BR>
> > > > +; Copyright (c) 2006 - 2018, Intel Corporation. All
> > > > rights reserved.<BR>
> > > > ; This program and the accompanying materials ; are licensed and
> > > > made available under the terms and conditions of the BSD License
> > > > ; which accompanies this distribution. The full text of the
> > > > license may be found at @@ -32,8 +32,8 @@
> > > > ;------------------------------------------------------
> > > > ------------------------
> > > > global ASM_PFX(InternalSyncDecrement)
> > > > ASM_PFX(InternalSyncDecrement):
> > > > - mov eax, [esp + 4]
> > > > - lock dec dword [eax]
> > > > - mov eax, [eax]
> > > > + mov ecx, [esp + 4]
> > > > + mov eax, 0FFFFFFFFh
> > > > + lock xadd dword [ecx], eax
> > > > + dec eax
> > > > ret
> > > > -
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Increment.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Increment.c
> > > > deleted file mode 100644
> > > > index c61a550119..0000000000
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Increment.c
> > > > +++ /dev/null
> > > > @@ -1,43 +0,0 @@
> > > > -/** @file
> > > > - InterLockedIncrement function
> > > > -
> > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > > reserved.<BR>
> > > > - This program and the accompanying materials
> > > > - are licensed and made available under the terms and conditions
> > > > of the BSD License
> > > > - which accompanies this distribution. The full text of the
> > > > license may be found at
> > > > - http://opensource.org/licenses/bsd-license.php.
> > > > -
> > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > > BASIS,
> > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > > EXPRESS
> > > > OR IMPLIED.
> > > > -
> > > > -**/
> > > > -
> > > > -
> > > > -
> > > > -
> > > > -/**
> > > > - Performs an atomic increment of an 32-bit unsigned integer.
> > > > -
> > > > - Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > - Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > -
> > > > - @param Value A pointer to the 32-bit value to increment.
> > > > -
> > > > - @return The incremented value.
> > > > -
> > > > -**/
> > > > -UINT32
> > > > -EFIAPI
> > > > -InternalSyncIncrement (
> > > > - IN volatile UINT32 *Value
> > > > - )
> > > > -{
> > > > - _asm {
> > > > - mov eax, Value
> > > > - lock inc dword ptr [eax]
> > > > - mov eax, [eax]
> > > > - }
> > > > -}
> > > > -
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Increment.nasm
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Increment.nasm
> > > > index 3902c73275..0677e4bf78 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Increment.nasm
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > Increment.nasm
> > > > @@ -32,8 +32,9 @@
> > > > ;------------------------------------------------------
> > > > ------------------------
> > > > global ASM_PFX(InternalSyncIncrement)
> > > > ASM_PFX(InternalSyncIncrement):
> > > > - mov eax, [esp + 4]
> > > > - lock inc dword [eax]
> > > > - mov eax, [eax]
> > > > + mov ecx, [esp + 4]
> > > > + mov eax, 1
> > > > + lock xadd dword [ecx], eax
> > > > + inc eax
> > > > ret
> > > >
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > c
> > > > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > c
> > > > index 76c5a1275c..0ab59ca702 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > c
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > c
> > > > @@ -231,8 +231,7 @@ ReleaseSpinLock (
> > > >
> > > > Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > @@ -256,8 +255,7 @@ InterlockedIncrement (
> > > >
> > > > Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the decremented value. The decrement
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > cc.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > cc.c
> > > > index 5ac548b19f..177739d3da 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > cc.c
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > cc.c
> > > > @@ -247,8 +247,7 @@ ReleaseSpinLock (
> > > >
> > > > Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > @@ -272,8 +271,7 @@ InterlockedIncrement (
> > > >
> > > > Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the decremented value. The decrement
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > sc.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > sc.c
> > > > index e3298c8ab4..6ab2d71870 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > sc.c
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > sc.c
> > > > @@ -249,8 +249,7 @@ ReleaseSpinLock (
> > > >
> > > > Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > @@ -274,8 +273,7 @@ InterlockedIncrement (
> > > >
> > > > Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the decremented value. The decrement
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > If Value is NULL, then ASSERT().
> > > >
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > index 5224dd063f..4c4d6e3fc7 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > @@ -15,14 +15,12 @@
> > > >
> > > >
> > > >
> > > > -
> > > > /**
> > > > Performs an atomic increment of an 32-bit unsigned integer.
> > > >
> > > > Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > @param Value A pointer to the 32-bit value to increment.
> > > >
> > > > @@ -38,9 +36,10 @@ InternalSyncIncrement (
> > > > UINT32 Result;
> > > >
> > > > __asm__ __volatile__ (
> > > > + "movl $1, %%eax \n\t"
> > > > "lock \n\t"
> > > > - "incl %2 \n\t"
> > > > - "mov %2, %%eax "
> > > > + "xadd %%eax, %2 \n\t"
> > > > + "inc %%eax "
> > > > : "=a" (Result), // %0
> > > > "=m" (*Value) // %1
> > > > : "m" (*Value) // %2
> > > > @@ -57,8 +56,7 @@ InternalSyncIncrement (
> > > >
> > > > Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > Value and returns the decremented value. The decrement
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > + performed using MP safe mechanisms.
> > > >
> > > > @param Value A pointer to the 32-bit value to decrement.
> > > >
> > > > @@ -74,9 +72,10 @@ InternalSyncDecrement (
> > > > UINT32 Result;
> > > >
> > > > __asm__ __volatile__ (
> > > > - "lock \n\t"
> > > > - "decl %2 \n\t"
> > > > - "mov %2, %%eax "
> > > > + "movl $-1, %%eax \n\t"
> > > > + "lock \n\t"
> > > > + "xadd %%eax, %2 \n\t"
> > > > + "dec %%eax "
> > > > : "=a" (Result), // %0
> > > > "=m" (*Value) // %1
> > > > : "m" (*Value) // %2
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > ecrement.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > ecrement.c
> > > > deleted file mode 100644
> > > > index da402cd4c6..0000000000
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > ecrement.c
> > > > +++ /dev/null
> > > > @@ -1,46 +0,0 @@
> > > > -/** @file
> > > > - InterlockedDecrement function
> > > > -
> > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > > reserved.<BR>
> > > > - This program and the accompanying materials
> > > > - are licensed and made available under the terms and conditions
> > > > of the BSD License
> > > > - which accompanies this distribution. The full text of the
> > > > license may be found at
> > > > - http://opensource.org/licenses/bsd-license.php.
> > > > -
> > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > > BASIS,
> > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > > EXPRESS
> > > > OR IMPLIED.
> > > > -
> > > > -**/
> > > > -
> > > > -/**
> > > > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> > > > -**/
> > > > -
> > > > -long _InterlockedDecrement(
> > > > - long * lpAddend
> > > > -);
> > > > -
> > > > -#pragma intrinsic(_InterlockedDecrement)
> > > > -
> > > > -/**
> > > > - Performs an atomic decrement of an 32-bit unsigned integer.
> > > > -
> > > > - Performs an atomic decrement of the 32-bit unsigned integer
> > > > specified by
> > > > - Value and returns the decrement value. The decrement operation
> > > > must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > -
> > > > - @param Value A pointer to the 32-bit value to decrement.
> > > > -
> > > > - @return The decrement value.
> > > > -
> > > > -**/
> > > > -UINT32
> > > > -EFIAPI
> > > > -InternalSyncDecrement (
> > > > - IN volatile UINT32 *Value
> > > > - )
> > > > -{
> > > > - return _InterlockedDecrement ((long *)(UINTN)(Value)); -}
> > > > -
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > ecrement.nasm
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > ecrement.nasm
> > > > index 60f43111fe..dabdca945e 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > ecrement.nasm
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > ecrement.nasm
> > > > @@ -1,6 +1,6 @@
> > > > ;------------------------------------------------------
> > > > ------------------------
> > > > ;
> > > > -; Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > > reserved.<BR>
> > > > +; Copyright (c) 2006 - 2018, Intel Corporation. All
> > > > rights reserved.<BR>
> > > > ; This program and the accompanying materials ; are licensed and
> > > > made available under the terms and conditions of the BSD License
> > > > ; which accompanies this distribution. The full text of the
> > > > license may be found at @@ -33,7 +33,7 @@
> > > > ;------------------------------------------------------
> > > > ------------------------
> > > > global ASM_PFX(InternalSyncDecrement)
> > > > ASM_PFX(InternalSyncDecrement):
> > > > - lock dec dword [rcx]
> > > > - mov eax, [rcx]
> > > > + mov eax, 0FFFFFFFFh
> > > > + lock xadd dword [rcx], eax
> > > > + dec eax
> > > > ret
> > > > -
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > ncrement.c
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > ncrement.c
> > > > deleted file mode 100644
> > > > index bbd1384602..0000000000
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > ncrement.c
> > > > +++ /dev/null
> > > > @@ -1,46 +0,0 @@
> > > > -/** @file
> > > > - InterLockedIncrement function
> > > > -
> > > > - Copyright (c) 2006 - 2016, Intel Corporation. All rights
> > > > reserved.<BR>
> > > > - This program and the accompanying materials
> > > > - are licensed and made available under the terms and conditions
> > > > of the BSD License
> > > > - which accompanies this distribution. The full text of the
> > > > license may be found at
> > > > - http://opensource.org/licenses/bsd-license.php.
> > > > -
> > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS"
> > > > BASIS,
> > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
> > > EXPRESS
> > > > OR IMPLIED.
> > > > -
> > > > -**/
> > > > -
> > > > -/**
> > > > - Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
> > > > -**/
> > > > -
> > > > -long _InterlockedIncrement(
> > > > - long * lpAddend
> > > > -);
> > > > -
> > > > -#pragma intrinsic(_InterlockedIncrement)
> > > > -
> > > > -/**
> > > > - Performs an atomic increment of an 32-bit unsigned integer.
> > > > -
> > > > - Performs an atomic increment of the 32-bit unsigned integer
> > > > specified by
> > > > - Value and returns the incremented value. The increment
> > > > operation must be
> > > > - performed using MP safe mechanisms. The state of the return
> > > > value is not
> > > > - guaranteed to be MP safe.
> > > > -
> > > > - @param Value A pointer to the 32-bit value to increment.
> > > > -
> > > > - @return The incremented value.
> > > > -
> > > > -**/
> > > > -UINT32
> > > > -EFIAPI
> > > > -InternalSyncIncrement (
> > > > - IN volatile UINT32 *Value
> > > > - )
> > > > -{
> > > > - return _InterlockedIncrement ((long *)(UINTN)(Value)); -}
> > > > -
> > > > diff --git
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > ncrement.nasm
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > ncrement.nasm
> > > > index 7f877b5774..77379d998e 100644
> > > > ---
> > > > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > ncrement.nasm
> > > > +++
> > > > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > ncrement.nasm
> > > > @@ -33,7 +33,8 @@
> > > > ;------------------------------------------------------
> > > > ------------------------
> > > > global ASM_PFX(InternalSyncIncrement)
> > > > ASM_PFX(InternalSyncIncrement):
> > > > - lock inc dword [rcx]
> > > > - mov eax, [rcx]
> > > > + mov eax, 1
> > > > + lock xadd dword [rcx], eax
> > > > + inc eax
> > > > ret
> > > >
> > > > --
> > > > 2.16.1.windows.1
>
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-12 2:16 ` Ni, Ruiyu
@ 2018-09-12 14:53 ` Kinney, Michael D
2018-09-12 15:08 ` Gao, Liming
0 siblings, 1 reply; 11+ messages in thread
From: Kinney, Michael D @ 2018-09-12 14:53 UTC (permalink / raw)
To: Ni, Ruiyu, 'edk2-devel@lists.01.org', Kinney, Michael D
Cc: Yao, Jiewen, Gao, Liming
Ray,
Yes. This provides best size with optimizations enabled.
Mike
> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Tuesday, September 11, 2018 7:16 PM
> To: Ni, Ruiyu <ruiyu.ni@intel.com>; Kinney, Michael D
> <michael.d.kinney@intel.com>; 'edk2-devel@lists.01.org'
> <edk2-devel@lists.01.org>
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> <liming.gao@intel.com>
> Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
>
> Mike,
> Do you require to still use MSVC intrinsic function?
>
> > -----Original Message-----
> > From: edk2-devel [mailto:edk2-devel-
> bounces@lists.01.org] On Behalf Of Ni,
> > Ruiyu
> > Sent: Tuesday, September 11, 2018 10:27 AM
> > To: Kinney, Michael D <michael.d.kinney@intel.com>;
> 'edk2-devel@lists.01.org'
> > <edk2-devel@lists.01.org>
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> <liming.gao@intel.com>
> > Subject: Re: [edk2] [PATCH] MdePkg/SynchronizationLib:
> fix
> > Interlocked[De|In]crement return value
> >
> > The reason I didn't remove the GCC version is because
> Liming told me that there
> > is a XCODE issue which prevents using NASM for
> library.
> >
> > Thanks/Ray
> >
> > > -----Original Message-----
> > > From: Ni, Ruiyu
> > > Sent: Tuesday, September 11, 2018 10:25 AM
> > > To: Kinney, Michael D <michael.d.kinney@intel.com>;
> edk2-
> > > devel@lists.01.org
> > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > > <liming.gao@intel.com>
> > > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> > > Interlocked[De|In]crement return value
> > >
> > > The NASM does the exactly same as the MSFT
> intrinsic.
> > > I'd like to remove them because I was almost lost in
> so many versions
> > > of Interlocked[De|In]crement.
> > > I'd like to merge them to one version.
> > >
> > > Thanks/Ray
> > >
> > > > -----Original Message-----
> > > > From: Kinney, Michael D
> > > > Sent: Tuesday, September 11, 2018 12:39 AM
> > > > To: Ni, Ruiyu <ruiyu.ni@intel.com>; edk2-
> devel@lists.01.org; Kinney,
> > > > Michael D <michael.d.kinney@intel.com>
> > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> Liming
> > > > <liming.gao@intel.com>
> > > > Subject: RE: [PATCH] MdePkg/SynchronizationLib:
> fix
> > > > Interlocked[De|In]crement return value
> > > >
> > > > Ray,
> > > >
> > > > Why are we removing the use of intrinsics from
> MSFT builds? We
> > > > should keep those for more efficient code
> generation if the
> > > > intrinsic has the correct behavior.
> > > >
> > > > Thanks,
> > > >
> > > > Mike
> > > >
> > > > > -----Original Message-----
> > > > > From: Ni, Ruiyu
> > > > > Sent: Monday, September 10, 2018 3:06 AM
> > > > > To: edk2-devel@lists.01.org
> > > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> Liming
> > > > > <liming.gao@intel.com>; Kinney, Michael D
> > > > > <michael.d.kinney@intel.com>
> > > > > Subject: [PATCH] MdePkg/SynchronizationLib: fix
> > > > > Interlocked[De|In]crement return value
> > > > >
> > > > > Today's
> InterlockedIncrement()/InterlockedDecrement()
> > > > > guarantees to
> > > > > perform atomic increment/decrement but doesn't
> guarantee the
> > > > > return value equals to the new value.
> > > > >
> > > > > The patch fixes the behavior to use "XADD"
> instruction to
> > > > > guarantee the return value equals to the new
> value.
> > > > >
> > > > > Contributed-under: TianoCore Contribution
> Agreement 1.1
> > > > > Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> > > > > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > > > > Cc: Liming Gao <liming.gao@intel.com>
> > > > > Cc: Michael D Kinney
> <michael.d.kinney@intel.com>
> > > > > ---
> > > > > MdePkg/Include/Library/SynchronizationLib.h
> | 6
> > > > > +--
> > > > > .../BaseSynchronizationLib.inf
> | 18
> > > > > ++++-----
> > > > > .../BaseSynchronizationLibInternals.h
> | 6
> > > > > +--
> > > > > .../BaseSynchronizationLib/Ia32/GccInline.c
> | 18
> > > > > ++++-----
> > > > > .../Ia32/InterlockedDecrement.c
> | 42
> > > > > --------------------
> > > > > .../Ia32/InterlockedDecrement.nasm
> | 10
> > > > > ++---
> > > > > .../Ia32/InterlockedIncrement.c
> | 43
> > > > > --------------------
> > > > > .../Ia32/InterlockedIncrement.nasm
> | 7
> > > > > ++--
> > > > > .../BaseSynchronizationLib/Synchronization.c
> | 6
> > > > > +--
> > > > > .../BaseSynchronizationLib/SynchronizationGcc.c
> | 6
> > > > > +--
> > > > > .../BaseSynchronizationLib/SynchronizationMsc.c
> | 6
> > > > > +--
> > > > >
> .../Library/BaseSynchronizationLib/X64/GccInline.c | 19
> > > > > +++++----
> > > > > .../X64/InterlockedDecrement.c
> | 46
> > > > > ----------------------
> > > > > .../X64/InterlockedDecrement.nasm
> | 8
> > > > > ++--
> > > > > .../X64/InterlockedIncrement.c
> | 46
> > > > > ----------------------
> > > > > .../X64/InterlockedIncrement.nasm
> | 5
> > > > > ++-
> > > > > 16 files changed, 52 insertions(+), 240
> deletions(-) delete mode
> > > > > 100644
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe
> > > > > crement.c
> > > > > delete mode 100644
> > > > >
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn
> > > > > crement.c
> > > > > delete mode 100644
> > > > >
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec
> > > > > rement.c
> > > > > delete mode 100644
> > > > >
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc
> > > > > rement.c
> > > > >
> > > > > diff --git
> a/MdePkg/Include/Library/SynchronizationLib.h
> > > > > b/MdePkg/Include/Library/SynchronizationLib.h
> > > > > index da69f6ff5e..ce3bce04f5 100644
> > > > > ---
> a/MdePkg/Include/Library/SynchronizationLib.h
> > > > > +++
> b/MdePkg/Include/Library/SynchronizationLib.h
> > > > > @@ -144,8 +144,7 @@ ReleaseSpinLock (
> > > > >
> > > > > Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > @@ -166,8 +165,7 @@ InterlockedIncrement (
> > > > >
> > > > > Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the decremented value. The
> decrement
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLib.inf
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLib.inf
> > > > > index 0be1d4331f..b971cd138d 100755
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLib.inf
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLib.inf
> > > > > @@ -34,9 +34,9 @@ [Sources.IA32]
> > > > > Ia32/InterlockedCompareExchange64.c | MSFT
> > > > > Ia32/InterlockedCompareExchange32.c | MSFT
> > > > > Ia32/InterlockedCompareExchange16.c | MSFT
> > > > > - Ia32/InterlockedDecrement.c | MSFT
> > > > > - Ia32/InterlockedIncrement.c | MSFT
> > > > > - SynchronizationMsc.c | MSFT
> > > > > + Ia32/InterlockedDecrement.nasm | MSFT
> > > > > + Ia32/InterlockedIncrement.nasm | MSFT
> SynchronizationMsc.c |
> > > > > + MSFT
> > > > >
> > > > > Ia32/InterlockedCompareExchange64.nasm| INTEL
> > > > > Ia32/InterlockedCompareExchange32.nasm| INTEL
> @@ -54,17 +54,15
> > > > @@
> > > > > [Sources.X64]
> > > > > X64/InterlockedCompareExchange64.c | MSFT
> > > > > X64/InterlockedCompareExchange32.c | MSFT
> > > > > X64/InterlockedCompareExchange16.c | MSFT
> > > > > + X64/InterlockedDecrement.nasm | MSFT
> > > > X64/InterlockedIncrement.nasm
> > > > > + | MSFT SynchronizationMsc.c | MSFT
> > > > >
> > > > > X64/InterlockedCompareExchange64.nasm| INTEL
> > > > > X64/InterlockedCompareExchange32.nasm| INTEL
> > > > > X64/InterlockedCompareExchange16.nasm| INTEL
> > > > > -
> > > > > - X64/InterlockedDecrement.c | MSFT
> > > > > - X64/InterlockedIncrement.c | MSFT
> > > > > - SynchronizationMsc.c | MSFT
> > > > > -
> > > > > - X64/InterlockedDecrement.nasm| INTEL
> > > > > - X64/InterlockedIncrement.nasm| INTEL
> > > > > + X64/InterlockedDecrement.nasm | INTEL
> > > > > + X64/InterlockedIncrement.nasm | INTEL
> > > > > Synchronization.c | INTEL
> > > > >
> > > > > Ia32/InternalGetSpinLockProperties.c | GCC
> diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLibInternals.h
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLibInternals.h
> > > > > index 37edd7c188..8c363a8585 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLibInternals.h
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > ionLibInternals.h
> > > > > @@ -27,8 +27,7 @@
> > > > >
> > > > > Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > @param Value A pointer to the 32-bit value
> to increment.
> > > > >
> > > > > @@ -47,8 +46,7 @@ InternalSyncIncrement (
> > > > >
> > > > > Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the decrement value. The
> decrement operation
> > > > > must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > @param Value A pointer to the 32-bit value
> to decrement.
> > > > >
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > index 4ab293f243..d82e0205f5 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > @@ -20,8 +20,7 @@
> > > > >
> > > > > Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > @param Value A pointer to the 32-bit value
> to increment.
> > > > >
> > > > > @@ -37,9 +36,10 @@ InternalSyncIncrement (
> > > > > UINT32 Result;
> > > > >
> > > > > __asm__ __volatile__ (
> > > > > + "movl $1, %%eax \n\t"
> > > > > "lock \n\t"
> > > > > - "incl %2 \n\t"
> > > > > - "movl %2, %%eax "
> > > > > + "xadd %%eax, %2 \n\t"
> > > > > + "inc %%eax "
> > > > > : "=a" (Result), // %0
> > > > > "=m" (*Value) // %1
> > > > > : "m" (*Value) // %2
> > > > > @@ -57,8 +57,7 @@ InternalSyncIncrement (
> > > > >
> > > > > Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the decremented value. The
> decrement
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > @param Value A pointer to the 32-bit value
> to decrement.
> > > > >
> > > > > @@ -74,9 +73,10 @@ InternalSyncDecrement (
> > > > > UINT32 Result;
> > > > >
> > > > > __asm__ __volatile__ (
> > > > > - "lock \n\t"
> > > > > - "decl %2 \n\t"
> > > > > - "movl %2, %%eax "
> > > > > + "movl $-1, %%eax \n\t"
> > > > > + "lock \n\t"
> > > > > + "xadd %%eax, %2 \n\t"
> > > > > + "dec %%eax "
> > > > > : "=a" (Result), // %0
> > > > > "=m" (*Value) // %1
> > > > > : "m" (*Value) // %2
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Decrement.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Decrement.c
> > > > > deleted file mode 100644
> > > > > index 354a0e7ab1..0000000000
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Decrement.c
> > > > > +++ /dev/null
> > > > > @@ -1,42 +0,0 @@
> > > > > -/** @file
> > > > > - InterlockedDecrement function
> > > > > -
> > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> All rights
> > > > > reserved.<BR>
> > > > > - This program and the accompanying materials
> > > > > - are licensed and made available under the
> terms and conditions
> > > > > of the BSD License
> > > > > - which accompanies this distribution. The
> full text of the
> > > > > license may be found at
> > > > > - http://opensource.org/licenses/bsd-
> license.php.
> > > > > -
> > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> LICENSE ON AN "AS IS"
> > > > > BASIS,
> > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> KIND, EITHER
> > > > EXPRESS
> > > > > OR IMPLIED.
> > > > > -
> > > > > -**/
> > > > > -
> > > > > -
> > > > > -
> > > > > -
> > > > > -/**
> > > > > - Performs an atomic decrement of an 32-bit
> unsigned integer.
> > > > > -
> > > > > - Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > - Value and returns the decrement value. The
> decrement operation
> > > > > must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > -
> > > > > - @param Value A pointer to the 32-bit value
> to decrement.
> > > > > -
> > > > > - @return The decrement value.
> > > > > -
> > > > > -**/
> > > > > -UINT32
> > > > > -EFIAPI
> > > > > -InternalSyncDecrement (
> > > > > - IN volatile UINT32 *Value
> > > > > - )
> > > > > -{
> > > > > - _asm {
> > > > > - mov eax, Value
> > > > > - lock dec dword ptr [eax]
> > > > > - mov eax, [eax]
> > > > > - }
> > > > > -}
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Decrement.nasm
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Decrement.nasm
> > > > > index 4c46041186..dd5a8de3ed 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Decrement.nasm
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Decrement.nasm
> > > > > @@ -1,6 +1,6 @@
> > > > > ;----------------------------------------------
> --------
> > > > > ------------------------
> > > > > ;
> > > > > -; Copyright (c) 2006 - 2016, Intel Corporation.
> All rights
> > > > > reserved.<BR>
> > > > > +; Copyright (c) 2006 - 2018, Intel Corporation.
> All
> > > > > rights reserved.<BR>
> > > > > ; This program and the accompanying materials
> ; are licensed and
> > > > > made available under the terms and conditions of
> the BSD License
> > > > > ; which accompanies this distribution. The full
> text of the
> > > > > license may be found at @@ -32,8 +32,8 @@
> > > > > ;----------------------------------------------
> --------
> > > > > ------------------------
> > > > > global ASM_PFX(InternalSyncDecrement)
> > > > > ASM_PFX(InternalSyncDecrement):
> > > > > - mov eax, [esp + 4]
> > > > > - lock dec dword [eax]
> > > > > - mov eax, [eax]
> > > > > + mov ecx, [esp + 4]
> > > > > + mov eax, 0FFFFFFFFh
> > > > > + lock xadd dword [ecx], eax
> > > > > + dec eax
> > > > > ret
> > > > > -
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Increment.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Increment.c
> > > > > deleted file mode 100644
> > > > > index c61a550119..0000000000
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Increment.c
> > > > > +++ /dev/null
> > > > > @@ -1,43 +0,0 @@
> > > > > -/** @file
> > > > > - InterLockedIncrement function
> > > > > -
> > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> All rights
> > > > > reserved.<BR>
> > > > > - This program and the accompanying materials
> > > > > - are licensed and made available under the
> terms and conditions
> > > > > of the BSD License
> > > > > - which accompanies this distribution. The
> full text of the
> > > > > license may be found at
> > > > > - http://opensource.org/licenses/bsd-
> license.php.
> > > > > -
> > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> LICENSE ON AN "AS IS"
> > > > > BASIS,
> > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> KIND, EITHER
> > > > EXPRESS
> > > > > OR IMPLIED.
> > > > > -
> > > > > -**/
> > > > > -
> > > > > -
> > > > > -
> > > > > -
> > > > > -/**
> > > > > - Performs an atomic increment of an 32-bit
> unsigned integer.
> > > > > -
> > > > > - Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > - Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > -
> > > > > - @param Value A pointer to the 32-bit value
> to increment.
> > > > > -
> > > > > - @return The incremented value.
> > > > > -
> > > > > -**/
> > > > > -UINT32
> > > > > -EFIAPI
> > > > > -InternalSyncIncrement (
> > > > > - IN volatile UINT32 *Value
> > > > > - )
> > > > > -{
> > > > > - _asm {
> > > > > - mov eax, Value
> > > > > - lock inc dword ptr [eax]
> > > > > - mov eax, [eax]
> > > > > - }
> > > > > -}
> > > > > -
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Increment.nasm
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Increment.nasm
> > > > > index 3902c73275..0677e4bf78 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Increment.nasm
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > Increment.nasm
> > > > > @@ -32,8 +32,9 @@
> > > > > ;----------------------------------------------
> --------
> > > > > ------------------------
> > > > > global ASM_PFX(InternalSyncIncrement)
> > > > > ASM_PFX(InternalSyncIncrement):
> > > > > - mov eax, [esp + 4]
> > > > > - lock inc dword [eax]
> > > > > - mov eax, [eax]
> > > > > + mov ecx, [esp + 4]
> > > > > + mov eax, 1
> > > > > + lock xadd dword [ecx], eax
> > > > > + inc eax
> > > > > ret
> > > > >
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > c
> > > > > index 76c5a1275c..0ab59ca702 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > c
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > c
> > > > > @@ -231,8 +231,7 @@ ReleaseSpinLock (
> > > > >
> > > > > Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > @@ -256,8 +255,7 @@ InterlockedIncrement (
> > > > >
> > > > > Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the decremented value. The
> decrement
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > cc.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > cc.c
> > > > > index 5ac548b19f..177739d3da 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > cc.c
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > cc.c
> > > > > @@ -247,8 +247,7 @@ ReleaseSpinLock (
> > > > >
> > > > > Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > @@ -272,8 +271,7 @@ InterlockedIncrement (
> > > > >
> > > > > Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the decremented value. The
> decrement
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > sc.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > sc.c
> > > > > index e3298c8ab4..6ab2d71870 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > sc.c
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > sc.c
> > > > > @@ -249,8 +249,7 @@ ReleaseSpinLock (
> > > > >
> > > > > Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > @@ -274,8 +273,7 @@ InterlockedIncrement (
> > > > >
> > > > > Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the decremented value. The
> decrement
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > If Value is NULL, then ASSERT().
> > > > >
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > index 5224dd063f..4c4d6e3fc7 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > @@ -15,14 +15,12 @@
> > > > >
> > > > >
> > > > >
> > > > > -
> > > > > /**
> > > > > Performs an atomic increment of an 32-bit
> unsigned integer.
> > > > >
> > > > > Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > @param Value A pointer to the 32-bit value
> to increment.
> > > > >
> > > > > @@ -38,9 +36,10 @@ InternalSyncIncrement (
> > > > > UINT32 Result;
> > > > >
> > > > > __asm__ __volatile__ (
> > > > > + "movl $1, %%eax \n\t"
> > > > > "lock \n\t"
> > > > > - "incl %2 \n\t"
> > > > > - "mov %2, %%eax "
> > > > > + "xadd %%eax, %2 \n\t"
> > > > > + "inc %%eax "
> > > > > : "=a" (Result), // %0
> > > > > "=m" (*Value) // %1
> > > > > : "m" (*Value) // %2
> > > > > @@ -57,8 +56,7 @@ InternalSyncIncrement (
> > > > >
> > > > > Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > Value and returns the decremented value. The
> decrement
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > + performed using MP safe mechanisms.
> > > > >
> > > > > @param Value A pointer to the 32-bit value
> to decrement.
> > > > >
> > > > > @@ -74,9 +72,10 @@ InternalSyncDecrement (
> > > > > UINT32 Result;
> > > > >
> > > > > __asm__ __volatile__ (
> > > > > - "lock \n\t"
> > > > > - "decl %2 \n\t"
> > > > > - "mov %2, %%eax "
> > > > > + "movl $-1, %%eax \n\t"
> > > > > + "lock \n\t"
> > > > > + "xadd %%eax, %2 \n\t"
> > > > > + "dec %%eax "
> > > > > : "=a" (Result), // %0
> > > > > "=m" (*Value) // %1
> > > > > : "m" (*Value) // %2
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > ecrement.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > ecrement.c
> > > > > deleted file mode 100644
> > > > > index da402cd4c6..0000000000
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > ecrement.c
> > > > > +++ /dev/null
> > > > > @@ -1,46 +0,0 @@
> > > > > -/** @file
> > > > > - InterlockedDecrement function
> > > > > -
> > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> All rights
> > > > > reserved.<BR>
> > > > > - This program and the accompanying materials
> > > > > - are licensed and made available under the
> terms and conditions
> > > > > of the BSD License
> > > > > - which accompanies this distribution. The
> full text of the
> > > > > license may be found at
> > > > > - http://opensource.org/licenses/bsd-
> license.php.
> > > > > -
> > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> LICENSE ON AN "AS IS"
> > > > > BASIS,
> > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> KIND, EITHER
> > > > EXPRESS
> > > > > OR IMPLIED.
> > > > > -
> > > > > -**/
> > > > > -
> > > > > -/**
> > > > > - Microsoft Visual Studio 7.1 Function
> Prototypes for I/O Intrinsics.
> > > > > -**/
> > > > > -
> > > > > -long _InterlockedDecrement(
> > > > > - long * lpAddend
> > > > > -);
> > > > > -
> > > > > -#pragma intrinsic(_InterlockedDecrement)
> > > > > -
> > > > > -/**
> > > > > - Performs an atomic decrement of an 32-bit
> unsigned integer.
> > > > > -
> > > > > - Performs an atomic decrement of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > - Value and returns the decrement value. The
> decrement operation
> > > > > must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > -
> > > > > - @param Value A pointer to the 32-bit value
> to decrement.
> > > > > -
> > > > > - @return The decrement value.
> > > > > -
> > > > > -**/
> > > > > -UINT32
> > > > > -EFIAPI
> > > > > -InternalSyncDecrement (
> > > > > - IN volatile UINT32 *Value
> > > > > - )
> > > > > -{
> > > > > - return _InterlockedDecrement ((long
> *)(UINTN)(Value)); -}
> > > > > -
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > ecrement.nasm
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > ecrement.nasm
> > > > > index 60f43111fe..dabdca945e 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > ecrement.nasm
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > ecrement.nasm
> > > > > @@ -1,6 +1,6 @@
> > > > > ;----------------------------------------------
> --------
> > > > > ------------------------
> > > > > ;
> > > > > -; Copyright (c) 2006 - 2016, Intel Corporation.
> All rights
> > > > > reserved.<BR>
> > > > > +; Copyright (c) 2006 - 2018, Intel Corporation.
> All
> > > > > rights reserved.<BR>
> > > > > ; This program and the accompanying materials
> ; are licensed and
> > > > > made available under the terms and conditions of
> the BSD License
> > > > > ; which accompanies this distribution. The full
> text of the
> > > > > license may be found at @@ -33,7 +33,7 @@
> > > > > ;----------------------------------------------
> --------
> > > > > ------------------------
> > > > > global ASM_PFX(InternalSyncDecrement)
> > > > > ASM_PFX(InternalSyncDecrement):
> > > > > - lock dec dword [rcx]
> > > > > - mov eax, [rcx]
> > > > > + mov eax, 0FFFFFFFFh
> > > > > + lock xadd dword [rcx], eax
> > > > > + dec eax
> > > > > ret
> > > > > -
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > ncrement.c
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > ncrement.c
> > > > > deleted file mode 100644
> > > > > index bbd1384602..0000000000
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > ncrement.c
> > > > > +++ /dev/null
> > > > > @@ -1,46 +0,0 @@
> > > > > -/** @file
> > > > > - InterLockedIncrement function
> > > > > -
> > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> All rights
> > > > > reserved.<BR>
> > > > > - This program and the accompanying materials
> > > > > - are licensed and made available under the
> terms and conditions
> > > > > of the BSD License
> > > > > - which accompanies this distribution. The
> full text of the
> > > > > license may be found at
> > > > > - http://opensource.org/licenses/bsd-
> license.php.
> > > > > -
> > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> LICENSE ON AN "AS IS"
> > > > > BASIS,
> > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> KIND, EITHER
> > > > EXPRESS
> > > > > OR IMPLIED.
> > > > > -
> > > > > -**/
> > > > > -
> > > > > -/**
> > > > > - Microsoft Visual Studio 7.1 Function
> Prototypes for I/O Intrinsics.
> > > > > -**/
> > > > > -
> > > > > -long _InterlockedIncrement(
> > > > > - long * lpAddend
> > > > > -);
> > > > > -
> > > > > -#pragma intrinsic(_InterlockedIncrement)
> > > > > -
> > > > > -/**
> > > > > - Performs an atomic increment of an 32-bit
> unsigned integer.
> > > > > -
> > > > > - Performs an atomic increment of the 32-bit
> unsigned integer
> > > > > specified by
> > > > > - Value and returns the incremented value. The
> increment
> > > > > operation must be
> > > > > - performed using MP safe mechanisms. The state
> of the return
> > > > > value is not
> > > > > - guaranteed to be MP safe.
> > > > > -
> > > > > - @param Value A pointer to the 32-bit value
> to increment.
> > > > > -
> > > > > - @return The incremented value.
> > > > > -
> > > > > -**/
> > > > > -UINT32
> > > > > -EFIAPI
> > > > > -InternalSyncIncrement (
> > > > > - IN volatile UINT32 *Value
> > > > > - )
> > > > > -{
> > > > > - return _InterlockedIncrement ((long
> *)(UINTN)(Value)); -}
> > > > > -
> > > > > diff --git
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > ncrement.nasm
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > ncrement.nasm
> > > > > index 7f877b5774..77379d998e 100644
> > > > > ---
> > > > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > ncrement.nasm
> > > > > +++
> > > > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > ncrement.nasm
> > > > > @@ -33,7 +33,8 @@
> > > > > ;----------------------------------------------
> --------
> > > > > ------------------------
> > > > > global ASM_PFX(InternalSyncIncrement)
> > > > > ASM_PFX(InternalSyncIncrement):
> > > > > - lock inc dword [rcx]
> > > > > - mov eax, [rcx]
> > > > > + mov eax, 1
> > > > > + lock xadd dword [rcx], eax
> > > > > + inc eax
> > > > > ret
> > > > >
> > > > > --
> > > > > 2.16.1.windows.1
> >
> > _______________________________________________
> > edk2-devel mailing list
> > edk2-devel@lists.01.org
> > https://lists.01.org/mailman/listinfo/edk2-devel
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-12 14:53 ` Kinney, Michael D
@ 2018-09-12 15:08 ` Gao, Liming
2018-09-12 15:12 ` Kinney, Michael D
0 siblings, 1 reply; 11+ messages in thread
From: Gao, Liming @ 2018-09-12 15:08 UTC (permalink / raw)
To: Kinney, Michael D, Ni, Ruiyu, 'edk2-devel@lists.01.org'
Cc: Yao, Jiewen
Mike:
For this case InternalSyncDecrement, there are three implementations in SynchronizationLib library.
One is C inline assembly for GCC, another is intrinsic function for MSFT, last one is nasm implementation for INTEL compiler. We would like to keep one implementation. If intrinsic one is required to be kept, that means at least two implementations are required.
Thanks
Liming
> -----Original Message-----
> From: Kinney, Michael D
> Sent: Wednesday, September 12, 2018 10:53 PM
> To: Ni, Ruiyu <ruiyu.ni@intel.com>; 'edk2-devel@lists.01.org' <edk2-devel@lists.01.org>; Kinney, Michael D
> <michael.d.kinney@intel.com>
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming <liming.gao@intel.com>
> Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
>
> Ray,
>
> Yes. This provides best size with optimizations enabled.
>
> Mike
>
> > -----Original Message-----
> > From: Ni, Ruiyu
> > Sent: Tuesday, September 11, 2018 7:16 PM
> > To: Ni, Ruiyu <ruiyu.ni@intel.com>; Kinney, Michael D
> > <michael.d.kinney@intel.com>; 'edk2-devel@lists.01.org'
> > <edk2-devel@lists.01.org>
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > <liming.gao@intel.com>
> > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> > Interlocked[De|In]crement return value
> >
> > Mike,
> > Do you require to still use MSVC intrinsic function?
> >
> > > -----Original Message-----
> > > From: edk2-devel [mailto:edk2-devel-
> > bounces@lists.01.org] On Behalf Of Ni,
> > > Ruiyu
> > > Sent: Tuesday, September 11, 2018 10:27 AM
> > > To: Kinney, Michael D <michael.d.kinney@intel.com>;
> > 'edk2-devel@lists.01.org'
> > > <edk2-devel@lists.01.org>
> > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > <liming.gao@intel.com>
> > > Subject: Re: [edk2] [PATCH] MdePkg/SynchronizationLib:
> > fix
> > > Interlocked[De|In]crement return value
> > >
> > > The reason I didn't remove the GCC version is because
> > Liming told me that there
> > > is a XCODE issue which prevents using NASM for
> > library.
> > >
> > > Thanks/Ray
> > >
> > > > -----Original Message-----
> > > > From: Ni, Ruiyu
> > > > Sent: Tuesday, September 11, 2018 10:25 AM
> > > > To: Kinney, Michael D <michael.d.kinney@intel.com>;
> > edk2-
> > > > devel@lists.01.org
> > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > > > <liming.gao@intel.com>
> > > > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> > > > Interlocked[De|In]crement return value
> > > >
> > > > The NASM does the exactly same as the MSFT
> > intrinsic.
> > > > I'd like to remove them because I was almost lost in
> > so many versions
> > > > of Interlocked[De|In]crement.
> > > > I'd like to merge them to one version.
> > > >
> > > > Thanks/Ray
> > > >
> > > > > -----Original Message-----
> > > > > From: Kinney, Michael D
> > > > > Sent: Tuesday, September 11, 2018 12:39 AM
> > > > > To: Ni, Ruiyu <ruiyu.ni@intel.com>; edk2-
> > devel@lists.01.org; Kinney,
> > > > > Michael D <michael.d.kinney@intel.com>
> > > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> > Liming
> > > > > <liming.gao@intel.com>
> > > > > Subject: RE: [PATCH] MdePkg/SynchronizationLib:
> > fix
> > > > > Interlocked[De|In]crement return value
> > > > >
> > > > > Ray,
> > > > >
> > > > > Why are we removing the use of intrinsics from
> > MSFT builds? We
> > > > > should keep those for more efficient code
> > generation if the
> > > > > intrinsic has the correct behavior.
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Mike
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: Ni, Ruiyu
> > > > > > Sent: Monday, September 10, 2018 3:06 AM
> > > > > > To: edk2-devel@lists.01.org
> > > > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> > Liming
> > > > > > <liming.gao@intel.com>; Kinney, Michael D
> > > > > > <michael.d.kinney@intel.com>
> > > > > > Subject: [PATCH] MdePkg/SynchronizationLib: fix
> > > > > > Interlocked[De|In]crement return value
> > > > > >
> > > > > > Today's
> > InterlockedIncrement()/InterlockedDecrement()
> > > > > > guarantees to
> > > > > > perform atomic increment/decrement but doesn't
> > guarantee the
> > > > > > return value equals to the new value.
> > > > > >
> > > > > > The patch fixes the behavior to use "XADD"
> > instruction to
> > > > > > guarantee the return value equals to the new
> > value.
> > > > > >
> > > > > > Contributed-under: TianoCore Contribution
> > Agreement 1.1
> > > > > > Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> > > > > > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > > > > > Cc: Liming Gao <liming.gao@intel.com>
> > > > > > Cc: Michael D Kinney
> > <michael.d.kinney@intel.com>
> > > > > > ---
> > > > > > MdePkg/Include/Library/SynchronizationLib.h
> > | 6
> > > > > > +--
> > > > > > .../BaseSynchronizationLib.inf
> > | 18
> > > > > > ++++-----
> > > > > > .../BaseSynchronizationLibInternals.h
> > | 6
> > > > > > +--
> > > > > > .../BaseSynchronizationLib/Ia32/GccInline.c
> > | 18
> > > > > > ++++-----
> > > > > > .../Ia32/InterlockedDecrement.c
> > | 42
> > > > > > --------------------
> > > > > > .../Ia32/InterlockedDecrement.nasm
> > | 10
> > > > > > ++---
> > > > > > .../Ia32/InterlockedIncrement.c
> > | 43
> > > > > > --------------------
> > > > > > .../Ia32/InterlockedIncrement.nasm
> > | 7
> > > > > > ++--
> > > > > > .../BaseSynchronizationLib/Synchronization.c
> > | 6
> > > > > > +--
> > > > > > .../BaseSynchronizationLib/SynchronizationGcc.c
> > | 6
> > > > > > +--
> > > > > > .../BaseSynchronizationLib/SynchronizationMsc.c
> > | 6
> > > > > > +--
> > > > > >
> > .../Library/BaseSynchronizationLib/X64/GccInline.c | 19
> > > > > > +++++----
> > > > > > .../X64/InterlockedDecrement.c
> > | 46
> > > > > > ----------------------
> > > > > > .../X64/InterlockedDecrement.nasm
> > | 8
> > > > > > ++--
> > > > > > .../X64/InterlockedIncrement.c
> > | 46
> > > > > > ----------------------
> > > > > > .../X64/InterlockedIncrement.nasm
> > | 5
> > > > > > ++-
> > > > > > 16 files changed, 52 insertions(+), 240
> > deletions(-) delete mode
> > > > > > 100644
> > MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe
> > > > > > crement.c
> > > > > > delete mode 100644
> > > > > >
> > MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn
> > > > > > crement.c
> > > > > > delete mode 100644
> > > > > >
> > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec
> > > > > > rement.c
> > > > > > delete mode 100644
> > > > > >
> > MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc
> > > > > > rement.c
> > > > > >
> > > > > > diff --git
> > a/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > b/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > index da69f6ff5e..ce3bce04f5 100644
> > > > > > ---
> > a/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > +++
> > b/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > @@ -144,8 +144,7 @@ ReleaseSpinLock (
> > > > > >
> > > > > > Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > @@ -166,8 +165,7 @@ InterlockedIncrement (
> > > > > >
> > > > > > Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the decremented value. The
> > decrement
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLib.inf
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLib.inf
> > > > > > index 0be1d4331f..b971cd138d 100755
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLib.inf
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLib.inf
> > > > > > @@ -34,9 +34,9 @@ [Sources.IA32]
> > > > > > Ia32/InterlockedCompareExchange64.c | MSFT
> > > > > > Ia32/InterlockedCompareExchange32.c | MSFT
> > > > > > Ia32/InterlockedCompareExchange16.c | MSFT
> > > > > > - Ia32/InterlockedDecrement.c | MSFT
> > > > > > - Ia32/InterlockedIncrement.c | MSFT
> > > > > > - SynchronizationMsc.c | MSFT
> > > > > > + Ia32/InterlockedDecrement.nasm | MSFT
> > > > > > + Ia32/InterlockedIncrement.nasm | MSFT
> > SynchronizationMsc.c |
> > > > > > + MSFT
> > > > > >
> > > > > > Ia32/InterlockedCompareExchange64.nasm| INTEL
> > > > > > Ia32/InterlockedCompareExchange32.nasm| INTEL
> > @@ -54,17 +54,15
> > > > > @@
> > > > > > [Sources.X64]
> > > > > > X64/InterlockedCompareExchange64.c | MSFT
> > > > > > X64/InterlockedCompareExchange32.c | MSFT
> > > > > > X64/InterlockedCompareExchange16.c | MSFT
> > > > > > + X64/InterlockedDecrement.nasm | MSFT
> > > > > X64/InterlockedIncrement.nasm
> > > > > > + | MSFT SynchronizationMsc.c | MSFT
> > > > > >
> > > > > > X64/InterlockedCompareExchange64.nasm| INTEL
> > > > > > X64/InterlockedCompareExchange32.nasm| INTEL
> > > > > > X64/InterlockedCompareExchange16.nasm| INTEL
> > > > > > -
> > > > > > - X64/InterlockedDecrement.c | MSFT
> > > > > > - X64/InterlockedIncrement.c | MSFT
> > > > > > - SynchronizationMsc.c | MSFT
> > > > > > -
> > > > > > - X64/InterlockedDecrement.nasm| INTEL
> > > > > > - X64/InterlockedIncrement.nasm| INTEL
> > > > > > + X64/InterlockedDecrement.nasm | INTEL
> > > > > > + X64/InterlockedIncrement.nasm | INTEL
> > > > > > Synchronization.c | INTEL
> > > > > >
> > > > > > Ia32/InternalGetSpinLockProperties.c | GCC
> > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLibInternals.h
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLibInternals.h
> > > > > > index 37edd7c188..8c363a8585 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLibInternals.h
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > ionLibInternals.h
> > > > > > @@ -27,8 +27,7 @@
> > > > > >
> > > > > > Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > @param Value A pointer to the 32-bit value
> > to increment.
> > > > > >
> > > > > > @@ -47,8 +46,7 @@ InternalSyncIncrement (
> > > > > >
> > > > > > Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the decrement value. The
> > decrement operation
> > > > > > must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > @param Value A pointer to the 32-bit value
> > to decrement.
> > > > > >
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > > index 4ab293f243..d82e0205f5 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > > @@ -20,8 +20,7 @@
> > > > > >
> > > > > > Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > @param Value A pointer to the 32-bit value
> > to increment.
> > > > > >
> > > > > > @@ -37,9 +36,10 @@ InternalSyncIncrement (
> > > > > > UINT32 Result;
> > > > > >
> > > > > > __asm__ __volatile__ (
> > > > > > + "movl $1, %%eax \n\t"
> > > > > > "lock \n\t"
> > > > > > - "incl %2 \n\t"
> > > > > > - "movl %2, %%eax "
> > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > + "inc %%eax "
> > > > > > : "=a" (Result), // %0
> > > > > > "=m" (*Value) // %1
> > > > > > : "m" (*Value) // %2
> > > > > > @@ -57,8 +57,7 @@ InternalSyncIncrement (
> > > > > >
> > > > > > Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the decremented value. The
> > decrement
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > @param Value A pointer to the 32-bit value
> > to decrement.
> > > > > >
> > > > > > @@ -74,9 +73,10 @@ InternalSyncDecrement (
> > > > > > UINT32 Result;
> > > > > >
> > > > > > __asm__ __volatile__ (
> > > > > > - "lock \n\t"
> > > > > > - "decl %2 \n\t"
> > > > > > - "movl %2, %%eax "
> > > > > > + "movl $-1, %%eax \n\t"
> > > > > > + "lock \n\t"
> > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > + "dec %%eax "
> > > > > > : "=a" (Result), // %0
> > > > > > "=m" (*Value) // %1
> > > > > > : "m" (*Value) // %2
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Decrement.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Decrement.c
> > > > > > deleted file mode 100644
> > > > > > index 354a0e7ab1..0000000000
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Decrement.c
> > > > > > +++ /dev/null
> > > > > > @@ -1,42 +0,0 @@
> > > > > > -/** @file
> > > > > > - InterlockedDecrement function
> > > > > > -
> > > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> > All rights
> > > > > > reserved.<BR>
> > > > > > - This program and the accompanying materials
> > > > > > - are licensed and made available under the
> > terms and conditions
> > > > > > of the BSD License
> > > > > > - which accompanies this distribution. The
> > full text of the
> > > > > > license may be found at
> > > > > > - http://opensource.org/licenses/bsd-
> > license.php.
> > > > > > -
> > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > LICENSE ON AN "AS IS"
> > > > > > BASIS,
> > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> > KIND, EITHER
> > > > > EXPRESS
> > > > > > OR IMPLIED.
> > > > > > -
> > > > > > -**/
> > > > > > -
> > > > > > -
> > > > > > -
> > > > > > -
> > > > > > -/**
> > > > > > - Performs an atomic decrement of an 32-bit
> > unsigned integer.
> > > > > > -
> > > > > > - Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > - Value and returns the decrement value. The
> > decrement operation
> > > > > > must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > -
> > > > > > - @param Value A pointer to the 32-bit value
> > to decrement.
> > > > > > -
> > > > > > - @return The decrement value.
> > > > > > -
> > > > > > -**/
> > > > > > -UINT32
> > > > > > -EFIAPI
> > > > > > -InternalSyncDecrement (
> > > > > > - IN volatile UINT32 *Value
> > > > > > - )
> > > > > > -{
> > > > > > - _asm {
> > > > > > - mov eax, Value
> > > > > > - lock dec dword ptr [eax]
> > > > > > - mov eax, [eax]
> > > > > > - }
> > > > > > -}
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Decrement.nasm
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Decrement.nasm
> > > > > > index 4c46041186..dd5a8de3ed 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Decrement.nasm
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Decrement.nasm
> > > > > > @@ -1,6 +1,6 @@
> > > > > > ;----------------------------------------------
> > --------
> > > > > > ------------------------
> > > > > > ;
> > > > > > -; Copyright (c) 2006 - 2016, Intel Corporation.
> > All rights
> > > > > > reserved.<BR>
> > > > > > +; Copyright (c) 2006 - 2018, Intel Corporation.
> > All
> > > > > > rights reserved.<BR>
> > > > > > ; This program and the accompanying materials
> > ; are licensed and
> > > > > > made available under the terms and conditions of
> > the BSD License
> > > > > > ; which accompanies this distribution. The full
> > text of the
> > > > > > license may be found at @@ -32,8 +32,8 @@
> > > > > > ;----------------------------------------------
> > --------
> > > > > > ------------------------
> > > > > > global ASM_PFX(InternalSyncDecrement)
> > > > > > ASM_PFX(InternalSyncDecrement):
> > > > > > - mov eax, [esp + 4]
> > > > > > - lock dec dword [eax]
> > > > > > - mov eax, [eax]
> > > > > > + mov ecx, [esp + 4]
> > > > > > + mov eax, 0FFFFFFFFh
> > > > > > + lock xadd dword [ecx], eax
> > > > > > + dec eax
> > > > > > ret
> > > > > > -
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Increment.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Increment.c
> > > > > > deleted file mode 100644
> > > > > > index c61a550119..0000000000
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Increment.c
> > > > > > +++ /dev/null
> > > > > > @@ -1,43 +0,0 @@
> > > > > > -/** @file
> > > > > > - InterLockedIncrement function
> > > > > > -
> > > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> > All rights
> > > > > > reserved.<BR>
> > > > > > - This program and the accompanying materials
> > > > > > - are licensed and made available under the
> > terms and conditions
> > > > > > of the BSD License
> > > > > > - which accompanies this distribution. The
> > full text of the
> > > > > > license may be found at
> > > > > > - http://opensource.org/licenses/bsd-
> > license.php.
> > > > > > -
> > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > LICENSE ON AN "AS IS"
> > > > > > BASIS,
> > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> > KIND, EITHER
> > > > > EXPRESS
> > > > > > OR IMPLIED.
> > > > > > -
> > > > > > -**/
> > > > > > -
> > > > > > -
> > > > > > -
> > > > > > -
> > > > > > -/**
> > > > > > - Performs an atomic increment of an 32-bit
> > unsigned integer.
> > > > > > -
> > > > > > - Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > - Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > -
> > > > > > - @param Value A pointer to the 32-bit value
> > to increment.
> > > > > > -
> > > > > > - @return The incremented value.
> > > > > > -
> > > > > > -**/
> > > > > > -UINT32
> > > > > > -EFIAPI
> > > > > > -InternalSyncIncrement (
> > > > > > - IN volatile UINT32 *Value
> > > > > > - )
> > > > > > -{
> > > > > > - _asm {
> > > > > > - mov eax, Value
> > > > > > - lock inc dword ptr [eax]
> > > > > > - mov eax, [eax]
> > > > > > - }
> > > > > > -}
> > > > > > -
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Increment.nasm
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Increment.nasm
> > > > > > index 3902c73275..0677e4bf78 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Increment.nasm
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > Increment.nasm
> > > > > > @@ -32,8 +32,9 @@
> > > > > > ;----------------------------------------------
> > --------
> > > > > > ------------------------
> > > > > > global ASM_PFX(InternalSyncIncrement)
> > > > > > ASM_PFX(InternalSyncIncrement):
> > > > > > - mov eax, [esp + 4]
> > > > > > - lock inc dword [eax]
> > > > > > - mov eax, [eax]
> > > > > > + mov ecx, [esp + 4]
> > > > > > + mov eax, 1
> > > > > > + lock xadd dword [ecx], eax
> > > > > > + inc eax
> > > > > > ret
> > > > > >
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > c
> > > > > > index 76c5a1275c..0ab59ca702 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > c
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > c
> > > > > > @@ -231,8 +231,7 @@ ReleaseSpinLock (
> > > > > >
> > > > > > Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > @@ -256,8 +255,7 @@ InterlockedIncrement (
> > > > > >
> > > > > > Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the decremented value. The
> > decrement
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > cc.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > cc.c
> > > > > > index 5ac548b19f..177739d3da 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > cc.c
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > cc.c
> > > > > > @@ -247,8 +247,7 @@ ReleaseSpinLock (
> > > > > >
> > > > > > Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > @@ -272,8 +271,7 @@ InterlockedIncrement (
> > > > > >
> > > > > > Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the decremented value. The
> > decrement
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > sc.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > sc.c
> > > > > > index e3298c8ab4..6ab2d71870 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > sc.c
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > sc.c
> > > > > > @@ -249,8 +249,7 @@ ReleaseSpinLock (
> > > > > >
> > > > > > Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > @@ -274,8 +273,7 @@ InterlockedIncrement (
> > > > > >
> > > > > > Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the decremented value. The
> > decrement
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > If Value is NULL, then ASSERT().
> > > > > >
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > > index 5224dd063f..4c4d6e3fc7 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > > @@ -15,14 +15,12 @@
> > > > > >
> > > > > >
> > > > > >
> > > > > > -
> > > > > > /**
> > > > > > Performs an atomic increment of an 32-bit
> > unsigned integer.
> > > > > >
> > > > > > Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > @param Value A pointer to the 32-bit value
> > to increment.
> > > > > >
> > > > > > @@ -38,9 +36,10 @@ InternalSyncIncrement (
> > > > > > UINT32 Result;
> > > > > >
> > > > > > __asm__ __volatile__ (
> > > > > > + "movl $1, %%eax \n\t"
> > > > > > "lock \n\t"
> > > > > > - "incl %2 \n\t"
> > > > > > - "mov %2, %%eax "
> > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > + "inc %%eax "
> > > > > > : "=a" (Result), // %0
> > > > > > "=m" (*Value) // %1
> > > > > > : "m" (*Value) // %2
> > > > > > @@ -57,8 +56,7 @@ InternalSyncIncrement (
> > > > > >
> > > > > > Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > Value and returns the decremented value. The
> > decrement
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > + performed using MP safe mechanisms.
> > > > > >
> > > > > > @param Value A pointer to the 32-bit value
> > to decrement.
> > > > > >
> > > > > > @@ -74,9 +72,10 @@ InternalSyncDecrement (
> > > > > > UINT32 Result;
> > > > > >
> > > > > > __asm__ __volatile__ (
> > > > > > - "lock \n\t"
> > > > > > - "decl %2 \n\t"
> > > > > > - "mov %2, %%eax "
> > > > > > + "movl $-1, %%eax \n\t"
> > > > > > + "lock \n\t"
> > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > + "dec %%eax "
> > > > > > : "=a" (Result), // %0
> > > > > > "=m" (*Value) // %1
> > > > > > : "m" (*Value) // %2
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > ecrement.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > ecrement.c
> > > > > > deleted file mode 100644
> > > > > > index da402cd4c6..0000000000
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > ecrement.c
> > > > > > +++ /dev/null
> > > > > > @@ -1,46 +0,0 @@
> > > > > > -/** @file
> > > > > > - InterlockedDecrement function
> > > > > > -
> > > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> > All rights
> > > > > > reserved.<BR>
> > > > > > - This program and the accompanying materials
> > > > > > - are licensed and made available under the
> > terms and conditions
> > > > > > of the BSD License
> > > > > > - which accompanies this distribution. The
> > full text of the
> > > > > > license may be found at
> > > > > > - http://opensource.org/licenses/bsd-
> > license.php.
> > > > > > -
> > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > LICENSE ON AN "AS IS"
> > > > > > BASIS,
> > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> > KIND, EITHER
> > > > > EXPRESS
> > > > > > OR IMPLIED.
> > > > > > -
> > > > > > -**/
> > > > > > -
> > > > > > -/**
> > > > > > - Microsoft Visual Studio 7.1 Function
> > Prototypes for I/O Intrinsics.
> > > > > > -**/
> > > > > > -
> > > > > > -long _InterlockedDecrement(
> > > > > > - long * lpAddend
> > > > > > -);
> > > > > > -
> > > > > > -#pragma intrinsic(_InterlockedDecrement)
> > > > > > -
> > > > > > -/**
> > > > > > - Performs an atomic decrement of an 32-bit
> > unsigned integer.
> > > > > > -
> > > > > > - Performs an atomic decrement of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > - Value and returns the decrement value. The
> > decrement operation
> > > > > > must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > -
> > > > > > - @param Value A pointer to the 32-bit value
> > to decrement.
> > > > > > -
> > > > > > - @return The decrement value.
> > > > > > -
> > > > > > -**/
> > > > > > -UINT32
> > > > > > -EFIAPI
> > > > > > -InternalSyncDecrement (
> > > > > > - IN volatile UINT32 *Value
> > > > > > - )
> > > > > > -{
> > > > > > - return _InterlockedDecrement ((long
> > *)(UINTN)(Value)); -}
> > > > > > -
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > ecrement.nasm
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > ecrement.nasm
> > > > > > index 60f43111fe..dabdca945e 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > ecrement.nasm
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > ecrement.nasm
> > > > > > @@ -1,6 +1,6 @@
> > > > > > ;----------------------------------------------
> > --------
> > > > > > ------------------------
> > > > > > ;
> > > > > > -; Copyright (c) 2006 - 2016, Intel Corporation.
> > All rights
> > > > > > reserved.<BR>
> > > > > > +; Copyright (c) 2006 - 2018, Intel Corporation.
> > All
> > > > > > rights reserved.<BR>
> > > > > > ; This program and the accompanying materials
> > ; are licensed and
> > > > > > made available under the terms and conditions of
> > the BSD License
> > > > > > ; which accompanies this distribution. The full
> > text of the
> > > > > > license may be found at @@ -33,7 +33,7 @@
> > > > > > ;----------------------------------------------
> > --------
> > > > > > ------------------------
> > > > > > global ASM_PFX(InternalSyncDecrement)
> > > > > > ASM_PFX(InternalSyncDecrement):
> > > > > > - lock dec dword [rcx]
> > > > > > - mov eax, [rcx]
> > > > > > + mov eax, 0FFFFFFFFh
> > > > > > + lock xadd dword [rcx], eax
> > > > > > + dec eax
> > > > > > ret
> > > > > > -
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > ncrement.c
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > ncrement.c
> > > > > > deleted file mode 100644
> > > > > > index bbd1384602..0000000000
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > ncrement.c
> > > > > > +++ /dev/null
> > > > > > @@ -1,46 +0,0 @@
> > > > > > -/** @file
> > > > > > - InterLockedIncrement function
> > > > > > -
> > > > > > - Copyright (c) 2006 - 2016, Intel Corporation.
> > All rights
> > > > > > reserved.<BR>
> > > > > > - This program and the accompanying materials
> > > > > > - are licensed and made available under the
> > terms and conditions
> > > > > > of the BSD License
> > > > > > - which accompanies this distribution. The
> > full text of the
> > > > > > license may be found at
> > > > > > - http://opensource.org/licenses/bsd-
> > license.php.
> > > > > > -
> > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > LICENSE ON AN "AS IS"
> > > > > > BASIS,
> > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY
> > KIND, EITHER
> > > > > EXPRESS
> > > > > > OR IMPLIED.
> > > > > > -
> > > > > > -**/
> > > > > > -
> > > > > > -/**
> > > > > > - Microsoft Visual Studio 7.1 Function
> > Prototypes for I/O Intrinsics.
> > > > > > -**/
> > > > > > -
> > > > > > -long _InterlockedIncrement(
> > > > > > - long * lpAddend
> > > > > > -);
> > > > > > -
> > > > > > -#pragma intrinsic(_InterlockedIncrement)
> > > > > > -
> > > > > > -/**
> > > > > > - Performs an atomic increment of an 32-bit
> > unsigned integer.
> > > > > > -
> > > > > > - Performs an atomic increment of the 32-bit
> > unsigned integer
> > > > > > specified by
> > > > > > - Value and returns the incremented value. The
> > increment
> > > > > > operation must be
> > > > > > - performed using MP safe mechanisms. The state
> > of the return
> > > > > > value is not
> > > > > > - guaranteed to be MP safe.
> > > > > > -
> > > > > > - @param Value A pointer to the 32-bit value
> > to increment.
> > > > > > -
> > > > > > - @return The incremented value.
> > > > > > -
> > > > > > -**/
> > > > > > -UINT32
> > > > > > -EFIAPI
> > > > > > -InternalSyncIncrement (
> > > > > > - IN volatile UINT32 *Value
> > > > > > - )
> > > > > > -{
> > > > > > - return _InterlockedIncrement ((long
> > *)(UINTN)(Value)); -}
> > > > > > -
> > > > > > diff --git
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > ncrement.nasm
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > ncrement.nasm
> > > > > > index 7f877b5774..77379d998e 100644
> > > > > > ---
> > > > > >
> > a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > ncrement.nasm
> > > > > > +++
> > > > > >
> > b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > ncrement.nasm
> > > > > > @@ -33,7 +33,8 @@
> > > > > > ;----------------------------------------------
> > --------
> > > > > > ------------------------
> > > > > > global ASM_PFX(InternalSyncIncrement)
> > > > > > ASM_PFX(InternalSyncIncrement):
> > > > > > - lock inc dword [rcx]
> > > > > > - mov eax, [rcx]
> > > > > > + mov eax, 1
> > > > > > + lock xadd dword [rcx], eax
> > > > > > + inc eax
> > > > > > ret
> > > > > >
> > > > > > --
> > > > > > 2.16.1.windows.1
> > >
> > > _______________________________________________
> > > edk2-devel mailing list
> > > edk2-devel@lists.01.org
> > > https://lists.01.org/mailman/listinfo/edk2-devel
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value
2018-09-12 15:08 ` Gao, Liming
@ 2018-09-12 15:12 ` Kinney, Michael D
0 siblings, 0 replies; 11+ messages in thread
From: Kinney, Michael D @ 2018-09-12 15:12 UTC (permalink / raw)
To: Gao, Liming, Ni, Ruiyu, 'edk2-devel@lists.01.org',
Kinney, Michael D
Cc: Yao, Jiewen
Liming,
Your analysis is correct. In the end there will be 2.
Mike
> -----Original Message-----
> From: Gao, Liming
> Sent: Wednesday, September 12, 2018 8:08 AM
> To: Kinney, Michael D <michael.d.kinney@intel.com>; Ni,
> Ruiyu <ruiyu.ni@intel.com>; 'edk2-devel@lists.01.org'
> <edk2-devel@lists.01.org>
> Cc: Yao, Jiewen <jiewen.yao@intel.com>
> Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
>
> Mike:
> For this case InternalSyncDecrement, there are three
> implementations in SynchronizationLib library.
> One is C inline assembly for GCC, another is intrinsic
> function for MSFT, last one is nasm implementation for
> INTEL compiler. We would like to keep one
> implementation. If intrinsic one is required to be kept,
> that means at least two implementations are required.
>
> Thanks
> Liming
> > -----Original Message-----
> > From: Kinney, Michael D
> > Sent: Wednesday, September 12, 2018 10:53 PM
> > To: Ni, Ruiyu <ruiyu.ni@intel.com>; 'edk2-
> devel@lists.01.org' <edk2-devel@lists.01.org>; Kinney,
> Michael D
> > <michael.d.kinney@intel.com>
> > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> <liming.gao@intel.com>
> > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> Interlocked[De|In]crement return value
> >
> > Ray,
> >
> > Yes. This provides best size with optimizations
> enabled.
> >
> > Mike
> >
> > > -----Original Message-----
> > > From: Ni, Ruiyu
> > > Sent: Tuesday, September 11, 2018 7:16 PM
> > > To: Ni, Ruiyu <ruiyu.ni@intel.com>; Kinney, Michael
> D
> > > <michael.d.kinney@intel.com>; 'edk2-
> devel@lists.01.org'
> > > <edk2-devel@lists.01.org>
> > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao, Liming
> > > <liming.gao@intel.com>
> > > Subject: RE: [PATCH] MdePkg/SynchronizationLib: fix
> > > Interlocked[De|In]crement return value
> > >
> > > Mike,
> > > Do you require to still use MSVC intrinsic function?
> > >
> > > > -----Original Message-----
> > > > From: edk2-devel [mailto:edk2-devel-
> > > bounces@lists.01.org] On Behalf Of Ni,
> > > > Ruiyu
> > > > Sent: Tuesday, September 11, 2018 10:27 AM
> > > > To: Kinney, Michael D
> <michael.d.kinney@intel.com>;
> > > 'edk2-devel@lists.01.org'
> > > > <edk2-devel@lists.01.org>
> > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> Liming
> > > <liming.gao@intel.com>
> > > > Subject: Re: [edk2] [PATCH]
> MdePkg/SynchronizationLib:
> > > fix
> > > > Interlocked[De|In]crement return value
> > > >
> > > > The reason I didn't remove the GCC version is
> because
> > > Liming told me that there
> > > > is a XCODE issue which prevents using NASM for
> > > library.
> > > >
> > > > Thanks/Ray
> > > >
> > > > > -----Original Message-----
> > > > > From: Ni, Ruiyu
> > > > > Sent: Tuesday, September 11, 2018 10:25 AM
> > > > > To: Kinney, Michael D
> <michael.d.kinney@intel.com>;
> > > edk2-
> > > > > devel@lists.01.org
> > > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> Liming
> > > > > <liming.gao@intel.com>
> > > > > Subject: RE: [PATCH] MdePkg/SynchronizationLib:
> fix
> > > > > Interlocked[De|In]crement return value
> > > > >
> > > > > The NASM does the exactly same as the MSFT
> > > intrinsic.
> > > > > I'd like to remove them because I was almost
> lost in
> > > so many versions
> > > > > of Interlocked[De|In]crement.
> > > > > I'd like to merge them to one version.
> > > > >
> > > > > Thanks/Ray
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: Kinney, Michael D
> > > > > > Sent: Tuesday, September 11, 2018 12:39 AM
> > > > > > To: Ni, Ruiyu <ruiyu.ni@intel.com>; edk2-
> > > devel@lists.01.org; Kinney,
> > > > > > Michael D <michael.d.kinney@intel.com>
> > > > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> > > Liming
> > > > > > <liming.gao@intel.com>
> > > > > > Subject: RE: [PATCH]
> MdePkg/SynchronizationLib:
> > > fix
> > > > > > Interlocked[De|In]crement return value
> > > > > >
> > > > > > Ray,
> > > > > >
> > > > > > Why are we removing the use of intrinsics from
> > > MSFT builds? We
> > > > > > should keep those for more efficient code
> > > generation if the
> > > > > > intrinsic has the correct behavior.
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Mike
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: Ni, Ruiyu
> > > > > > > Sent: Monday, September 10, 2018 3:06 AM
> > > > > > > To: edk2-devel@lists.01.org
> > > > > > > Cc: Yao, Jiewen <jiewen.yao@intel.com>; Gao,
> > > Liming
> > > > > > > <liming.gao@intel.com>; Kinney, Michael D
> > > > > > > <michael.d.kinney@intel.com>
> > > > > > > Subject: [PATCH] MdePkg/SynchronizationLib:
> fix
> > > > > > > Interlocked[De|In]crement return value
> > > > > > >
> > > > > > > Today's
> > > InterlockedIncrement()/InterlockedDecrement()
> > > > > > > guarantees to
> > > > > > > perform atomic increment/decrement but
> doesn't
> > > guarantee the
> > > > > > > return value equals to the new value.
> > > > > > >
> > > > > > > The patch fixes the behavior to use "XADD"
> > > instruction to
> > > > > > > guarantee the return value equals to the new
> > > value.
> > > > > > >
> > > > > > > Contributed-under: TianoCore Contribution
> > > Agreement 1.1
> > > > > > > Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> > > > > > > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > > > > > > Cc: Liming Gao <liming.gao@intel.com>
> > > > > > > Cc: Michael D Kinney
> > > <michael.d.kinney@intel.com>
> > > > > > > ---
> > > > > > > MdePkg/Include/Library/SynchronizationLib.h
> > > | 6
> > > > > > > +--
> > > > > > > .../BaseSynchronizationLib.inf
> > > | 18
> > > > > > > ++++-----
> > > > > > > .../BaseSynchronizationLibInternals.h
> > > | 6
> > > > > > > +--
> > > > > > > .../BaseSynchronizationLib/Ia32/GccInline.c
> > > | 18
> > > > > > > ++++-----
> > > > > > > .../Ia32/InterlockedDecrement.c
> > > | 42
> > > > > > > --------------------
> > > > > > > .../Ia32/InterlockedDecrement.nasm
> > > | 10
> > > > > > > ++---
> > > > > > > .../Ia32/InterlockedIncrement.c
> > > | 43
> > > > > > > --------------------
> > > > > > > .../Ia32/InterlockedIncrement.nasm
> > > | 7
> > > > > > > ++--
> > > > > > >
> .../BaseSynchronizationLib/Synchronization.c
> > > | 6
> > > > > > > +--
> > > > > > >
> .../BaseSynchronizationLib/SynchronizationGcc.c
> > > | 6
> > > > > > > +--
> > > > > > >
> .../BaseSynchronizationLib/SynchronizationMsc.c
> > > | 6
> > > > > > > +--
> > > > > > >
> > > .../Library/BaseSynchronizationLib/X64/GccInline.c |
> 19
> > > > > > > +++++----
> > > > > > > .../X64/InterlockedDecrement.c
> > > | 46
> > > > > > > ----------------------
> > > > > > > .../X64/InterlockedDecrement.nasm
> > > | 8
> > > > > > > ++--
> > > > > > > .../X64/InterlockedIncrement.c
> > > | 46
> > > > > > > ----------------------
> > > > > > > .../X64/InterlockedIncrement.nasm
> > > | 5
> > > > > > > ++-
> > > > > > > 16 files changed, 52 insertions(+), 240
> > > deletions(-) delete mode
> > > > > > > 100644
> > >
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedDe
> > > > > > > crement.c
> > > > > > > delete mode 100644
> > > > > > >
> > >
> MdePkg/Library/BaseSynchronizationLib/Ia32/InterlockedIn
> > > > > > > crement.c
> > > > > > > delete mode 100644
> > > > > > >
> > >
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDec
> > > > > > > rement.c
> > > > > > > delete mode 100644
> > > > > > >
> > >
> MdePkg/Library/BaseSynchronizationLib/X64/InterlockedInc
> > > > > > > rement.c
> > > > > > >
> > > > > > > diff --git
> > > a/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > >
> b/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > > index da69f6ff5e..ce3bce04f5 100644
> > > > > > > ---
> > > a/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > > +++
> > > b/MdePkg/Include/Library/SynchronizationLib.h
> > > > > > > @@ -144,8 +144,7 @@ ReleaseSpinLock (
> > > > > > >
> > > > > > > Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > @@ -166,8 +165,7 @@ InterlockedIncrement (
> > > > > > >
> > > > > > > Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the decremented value.
> The
> > > decrement
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLib.inf
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLib.inf
> > > > > > > index 0be1d4331f..b971cd138d 100755
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLib.inf
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLib.inf
> > > > > > > @@ -34,9 +34,9 @@ [Sources.IA32]
> > > > > > > Ia32/InterlockedCompareExchange64.c |
> MSFT
> > > > > > > Ia32/InterlockedCompareExchange32.c |
> MSFT
> > > > > > > Ia32/InterlockedCompareExchange16.c |
> MSFT
> > > > > > > - Ia32/InterlockedDecrement.c | MSFT
> > > > > > > - Ia32/InterlockedIncrement.c | MSFT
> > > > > > > - SynchronizationMsc.c | MSFT
> > > > > > > + Ia32/InterlockedDecrement.nasm | MSFT
> > > > > > > + Ia32/InterlockedIncrement.nasm | MSFT
> > > SynchronizationMsc.c |
> > > > > > > + MSFT
> > > > > > >
> > > > > > > Ia32/InterlockedCompareExchange64.nasm|
> INTEL
> > > > > > > Ia32/InterlockedCompareExchange32.nasm|
> INTEL
> > > @@ -54,17 +54,15
> > > > > > @@
> > > > > > > [Sources.X64]
> > > > > > > X64/InterlockedCompareExchange64.c | MSFT
> > > > > > > X64/InterlockedCompareExchange32.c | MSFT
> > > > > > > X64/InterlockedCompareExchange16.c | MSFT
> > > > > > > + X64/InterlockedDecrement.nasm | MSFT
> > > > > > X64/InterlockedIncrement.nasm
> > > > > > > + | MSFT SynchronizationMsc.c | MSFT
> > > > > > >
> > > > > > > X64/InterlockedCompareExchange64.nasm|
> INTEL
> > > > > > > X64/InterlockedCompareExchange32.nasm|
> INTEL
> > > > > > > X64/InterlockedCompareExchange16.nasm|
> INTEL
> > > > > > > -
> > > > > > > - X64/InterlockedDecrement.c | MSFT
> > > > > > > - X64/InterlockedIncrement.c | MSFT
> > > > > > > - SynchronizationMsc.c | MSFT
> > > > > > > -
> > > > > > > - X64/InterlockedDecrement.nasm| INTEL
> > > > > > > - X64/InterlockedIncrement.nasm| INTEL
> > > > > > > + X64/InterlockedDecrement.nasm | INTEL
> > > > > > > + X64/InterlockedIncrement.nasm | INTEL
> > > > > > > Synchronization.c | INTEL
> > > > > > >
> > > > > > > Ia32/InternalGetSpinLockProperties.c |
> GCC
> > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLibInternals.h
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLibInternals.h
> > > > > > > index 37edd7c188..8c363a8585 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLibInternals.h
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizat
> > > > > > > ionLibInternals.h
> > > > > > > @@ -27,8 +27,7 @@
> > > > > > >
> > > > > > > Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > @param Value A pointer to the 32-bit
> value
> > > to increment.
> > > > > > >
> > > > > > > @@ -47,8 +46,7 @@ InternalSyncIncrement (
> > > > > > >
> > > > > > > Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the decrement value.
> The
> > > decrement operation
> > > > > > > must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > @param Value A pointer to the 32-bit
> value
> > > to decrement.
> > > > > > >
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > > > index 4ab293f243..d82e0205f5 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/GccInline.c
> > > > > > > @@ -20,8 +20,7 @@
> > > > > > >
> > > > > > > Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > @param Value A pointer to the 32-bit
> value
> > > to increment.
> > > > > > >
> > > > > > > @@ -37,9 +36,10 @@ InternalSyncIncrement (
> > > > > > > UINT32 Result;
> > > > > > >
> > > > > > > __asm__ __volatile__ (
> > > > > > > + "movl $1, %%eax \n\t"
> > > > > > > "lock \n\t"
> > > > > > > - "incl %2 \n\t"
> > > > > > > - "movl %2, %%eax "
> > > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > > + "inc %%eax "
> > > > > > > : "=a" (Result), // %0
> > > > > > > "=m" (*Value) // %1
> > > > > > > : "m" (*Value) // %2
> > > > > > > @@ -57,8 +57,7 @@ InternalSyncIncrement (
> > > > > > >
> > > > > > > Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the decremented value.
> The
> > > decrement
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > @param Value A pointer to the 32-bit
> value
> > > to decrement.
> > > > > > >
> > > > > > > @@ -74,9 +73,10 @@ InternalSyncDecrement (
> > > > > > > UINT32 Result;
> > > > > > >
> > > > > > > __asm__ __volatile__ (
> > > > > > > - "lock \n\t"
> > > > > > > - "decl %2 \n\t"
> > > > > > > - "movl %2, %%eax "
> > > > > > > + "movl $-1, %%eax \n\t"
> > > > > > > + "lock \n\t"
> > > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > > + "dec %%eax "
> > > > > > > : "=a" (Result), // %0
> > > > > > > "=m" (*Value) // %1
> > > > > > > : "m" (*Value) // %2
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Decrement.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Decrement.c
> > > > > > > deleted file mode 100644
> > > > > > > index 354a0e7ab1..0000000000
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Decrement.c
> > > > > > > +++ /dev/null
> > > > > > > @@ -1,42 +0,0 @@
> > > > > > > -/** @file
> > > > > > > - InterlockedDecrement function
> > > > > > > -
> > > > > > > - Copyright (c) 2006 - 2016, Intel
> Corporation.
> > > All rights
> > > > > > > reserved.<BR>
> > > > > > > - This program and the accompanying
> materials
> > > > > > > - are licensed and made available under the
> > > terms and conditions
> > > > > > > of the BSD License
> > > > > > > - which accompanies this distribution. The
> > > full text of the
> > > > > > > license may be found at
> > > > > > > - http://opensource.org/licenses/bsd-
> > > license.php.
> > > > > > > -
> > > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > > LICENSE ON AN "AS IS"
> > > > > > > BASIS,
> > > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF
> ANY
> > > KIND, EITHER
> > > > > > EXPRESS
> > > > > > > OR IMPLIED.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -
> > > > > > > -
> > > > > > > -
> > > > > > > -
> > > > > > > -/**
> > > > > > > - Performs an atomic decrement of an 32-bit
> > > unsigned integer.
> > > > > > > -
> > > > > > > - Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > - Value and returns the decrement value.
> The
> > > decrement operation
> > > > > > > must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > -
> > > > > > > - @param Value A pointer to the 32-bit
> value
> > > to decrement.
> > > > > > > -
> > > > > > > - @return The decrement value.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -UINT32
> > > > > > > -EFIAPI
> > > > > > > -InternalSyncDecrement (
> > > > > > > - IN volatile UINT32 *Value
> > > > > > > - )
> > > > > > > -{
> > > > > > > - _asm {
> > > > > > > - mov eax, Value
> > > > > > > - lock dec dword ptr [eax]
> > > > > > > - mov eax, [eax]
> > > > > > > - }
> > > > > > > -}
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Decrement.nasm
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Decrement.nasm
> > > > > > > index 4c46041186..dd5a8de3ed 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Decrement.nasm
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Decrement.nasm
> > > > > > > @@ -1,6 +1,6 @@
> > > > > > > ;------------------------------------------
> ----
> > > --------
> > > > > > > ------------------------
> > > > > > > ;
> > > > > > > -; Copyright (c) 2006 - 2016, Intel
> Corporation.
> > > All rights
> > > > > > > reserved.<BR>
> > > > > > > +; Copyright (c) 2006 - 2018, Intel
> Corporation.
> > > All
> > > > > > > rights reserved.<BR>
> > > > > > > ; This program and the accompanying
> materials
> > > ; are licensed and
> > > > > > > made available under the terms and
> conditions of
> > > the BSD License
> > > > > > > ; which accompanies this distribution. The
> full
> > > text of the
> > > > > > > license may be found at @@ -32,8 +32,8 @@
> > > > > > > ;------------------------------------------
> ----
> > > --------
> > > > > > > ------------------------
> > > > > > > global ASM_PFX(InternalSyncDecrement)
> > > > > > > ASM_PFX(InternalSyncDecrement):
> > > > > > > - mov eax, [esp + 4]
> > > > > > > - lock dec dword [eax]
> > > > > > > - mov eax, [eax]
> > > > > > > + mov ecx, [esp + 4]
> > > > > > > + mov eax, 0FFFFFFFFh
> > > > > > > + lock xadd dword [ecx], eax
> > > > > > > + dec eax
> > > > > > > ret
> > > > > > > -
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Increment.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Increment.c
> > > > > > > deleted file mode 100644
> > > > > > > index c61a550119..0000000000
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Increment.c
> > > > > > > +++ /dev/null
> > > > > > > @@ -1,43 +0,0 @@
> > > > > > > -/** @file
> > > > > > > - InterLockedIncrement function
> > > > > > > -
> > > > > > > - Copyright (c) 2006 - 2016, Intel
> Corporation.
> > > All rights
> > > > > > > reserved.<BR>
> > > > > > > - This program and the accompanying
> materials
> > > > > > > - are licensed and made available under the
> > > terms and conditions
> > > > > > > of the BSD License
> > > > > > > - which accompanies this distribution. The
> > > full text of the
> > > > > > > license may be found at
> > > > > > > - http://opensource.org/licenses/bsd-
> > > license.php.
> > > > > > > -
> > > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > > LICENSE ON AN "AS IS"
> > > > > > > BASIS,
> > > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF
> ANY
> > > KIND, EITHER
> > > > > > EXPRESS
> > > > > > > OR IMPLIED.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -
> > > > > > > -
> > > > > > > -
> > > > > > > -
> > > > > > > -/**
> > > > > > > - Performs an atomic increment of an 32-bit
> > > unsigned integer.
> > > > > > > -
> > > > > > > - Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > - Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > -
> > > > > > > - @param Value A pointer to the 32-bit
> value
> > > to increment.
> > > > > > > -
> > > > > > > - @return The incremented value.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -UINT32
> > > > > > > -EFIAPI
> > > > > > > -InternalSyncIncrement (
> > > > > > > - IN volatile UINT32 *Value
> > > > > > > - )
> > > > > > > -{
> > > > > > > - _asm {
> > > > > > > - mov eax, Value
> > > > > > > - lock inc dword ptr [eax]
> > > > > > > - mov eax, [eax]
> > > > > > > - }
> > > > > > > -}
> > > > > > > -
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Increment.nasm
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Increment.nasm
> > > > > > > index 3902c73275..0677e4bf78 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Increment.nasm
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Ia32/Interlocked
> > > > > > > Increment.nasm
> > > > > > > @@ -32,8 +32,9 @@
> > > > > > > ;------------------------------------------
> ----
> > > --------
> > > > > > > ------------------------
> > > > > > > global ASM_PFX(InternalSyncIncrement)
> > > > > > > ASM_PFX(InternalSyncIncrement):
> > > > > > > - mov eax, [esp + 4]
> > > > > > > - lock inc dword [eax]
> > > > > > > - mov eax, [eax]
> > > > > > > + mov ecx, [esp + 4]
> > > > > > > + mov eax, 1
> > > > > > > + lock xadd dword [ecx], eax
> > > > > > > + inc eax
> > > > > > > ret
> > > > > > >
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > > c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > > c
> > > > > > > index 76c5a1275c..0ab59ca702 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > > c
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/Synchronization.
> > > > > > > c
> > > > > > > @@ -231,8 +231,7 @@ ReleaseSpinLock (
> > > > > > >
> > > > > > > Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > @@ -256,8 +255,7 @@ InterlockedIncrement (
> > > > > > >
> > > > > > > Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the decremented value.
> The
> > > decrement
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > > cc.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > > cc.c
> > > > > > > index 5ac548b19f..177739d3da 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > > cc.c
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationG
> > > > > > > cc.c
> > > > > > > @@ -247,8 +247,7 @@ ReleaseSpinLock (
> > > > > > >
> > > > > > > Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > @@ -272,8 +271,7 @@ InterlockedIncrement (
> > > > > > >
> > > > > > > Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the decremented value.
> The
> > > decrement
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > > sc.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > > sc.c
> > > > > > > index e3298c8ab4..6ab2d71870 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > > sc.c
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/SynchronizationM
> > > > > > > sc.c
> > > > > > > @@ -249,8 +249,7 @@ ReleaseSpinLock (
> > > > > > >
> > > > > > > Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > @@ -274,8 +273,7 @@ InterlockedIncrement (
> > > > > > >
> > > > > > > Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the decremented value.
> The
> > > decrement
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > If Value is NULL, then ASSERT().
> > > > > > >
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > > > index 5224dd063f..4c4d6e3fc7 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/GccInline.c
> > > > > > > @@ -15,14 +15,12 @@
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > -
> > > > > > > /**
> > > > > > > Performs an atomic increment of an 32-bit
> > > unsigned integer.
> > > > > > >
> > > > > > > Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > @param Value A pointer to the 32-bit
> value
> > > to increment.
> > > > > > >
> > > > > > > @@ -38,9 +36,10 @@ InternalSyncIncrement (
> > > > > > > UINT32 Result;
> > > > > > >
> > > > > > > __asm__ __volatile__ (
> > > > > > > + "movl $1, %%eax \n\t"
> > > > > > > "lock \n\t"
> > > > > > > - "incl %2 \n\t"
> > > > > > > - "mov %2, %%eax "
> > > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > > + "inc %%eax "
> > > > > > > : "=a" (Result), // %0
> > > > > > > "=m" (*Value) // %1
> > > > > > > : "m" (*Value) // %2
> > > > > > > @@ -57,8 +56,7 @@ InternalSyncIncrement (
> > > > > > >
> > > > > > > Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > Value and returns the decremented value.
> The
> > > decrement
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > + performed using MP safe mechanisms.
> > > > > > >
> > > > > > > @param Value A pointer to the 32-bit
> value
> > > to decrement.
> > > > > > >
> > > > > > > @@ -74,9 +72,10 @@ InternalSyncDecrement (
> > > > > > > UINT32 Result;
> > > > > > >
> > > > > > > __asm__ __volatile__ (
> > > > > > > - "lock \n\t"
> > > > > > > - "decl %2 \n\t"
> > > > > > > - "mov %2, %%eax "
> > > > > > > + "movl $-1, %%eax \n\t"
> > > > > > > + "lock \n\t"
> > > > > > > + "xadd %%eax, %2 \n\t"
> > > > > > > + "dec %%eax "
> > > > > > > : "=a" (Result), // %0
> > > > > > > "=m" (*Value) // %1
> > > > > > > : "m" (*Value) // %2
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > > ecrement.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > > ecrement.c
> > > > > > > deleted file mode 100644
> > > > > > > index da402cd4c6..0000000000
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > > ecrement.c
> > > > > > > +++ /dev/null
> > > > > > > @@ -1,46 +0,0 @@
> > > > > > > -/** @file
> > > > > > > - InterlockedDecrement function
> > > > > > > -
> > > > > > > - Copyright (c) 2006 - 2016, Intel
> Corporation.
> > > All rights
> > > > > > > reserved.<BR>
> > > > > > > - This program and the accompanying
> materials
> > > > > > > - are licensed and made available under the
> > > terms and conditions
> > > > > > > of the BSD License
> > > > > > > - which accompanies this distribution. The
> > > full text of the
> > > > > > > license may be found at
> > > > > > > - http://opensource.org/licenses/bsd-
> > > license.php.
> > > > > > > -
> > > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > > LICENSE ON AN "AS IS"
> > > > > > > BASIS,
> > > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF
> ANY
> > > KIND, EITHER
> > > > > > EXPRESS
> > > > > > > OR IMPLIED.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -
> > > > > > > -/**
> > > > > > > - Microsoft Visual Studio 7.1 Function
> > > Prototypes for I/O Intrinsics.
> > > > > > > -**/
> > > > > > > -
> > > > > > > -long _InterlockedDecrement(
> > > > > > > - long * lpAddend
> > > > > > > -);
> > > > > > > -
> > > > > > > -#pragma intrinsic(_InterlockedDecrement)
> > > > > > > -
> > > > > > > -/**
> > > > > > > - Performs an atomic decrement of an 32-bit
> > > unsigned integer.
> > > > > > > -
> > > > > > > - Performs an atomic decrement of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > - Value and returns the decrement value.
> The
> > > decrement operation
> > > > > > > must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > -
> > > > > > > - @param Value A pointer to the 32-bit
> value
> > > to decrement.
> > > > > > > -
> > > > > > > - @return The decrement value.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -UINT32
> > > > > > > -EFIAPI
> > > > > > > -InternalSyncDecrement (
> > > > > > > - IN volatile UINT32 *Value
> > > > > > > - )
> > > > > > > -{
> > > > > > > - return _InterlockedDecrement ((long
> > > *)(UINTN)(Value)); -}
> > > > > > > -
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > > ecrement.nasm
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > > ecrement.nasm
> > > > > > > index 60f43111fe..dabdca945e 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > > ecrement.nasm
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedD
> > > > > > > ecrement.nasm
> > > > > > > @@ -1,6 +1,6 @@
> > > > > > > ;------------------------------------------
> ----
> > > --------
> > > > > > > ------------------------
> > > > > > > ;
> > > > > > > -; Copyright (c) 2006 - 2016, Intel
> Corporation.
> > > All rights
> > > > > > > reserved.<BR>
> > > > > > > +; Copyright (c) 2006 - 2018, Intel
> Corporation.
> > > All
> > > > > > > rights reserved.<BR>
> > > > > > > ; This program and the accompanying
> materials
> > > ; are licensed and
> > > > > > > made available under the terms and
> conditions of
> > > the BSD License
> > > > > > > ; which accompanies this distribution. The
> full
> > > text of the
> > > > > > > license may be found at @@ -33,7 +33,7 @@
> > > > > > > ;------------------------------------------
> ----
> > > --------
> > > > > > > ------------------------
> > > > > > > global ASM_PFX(InternalSyncDecrement)
> > > > > > > ASM_PFX(InternalSyncDecrement):
> > > > > > > - lock dec dword [rcx]
> > > > > > > - mov eax, [rcx]
> > > > > > > + mov eax, 0FFFFFFFFh
> > > > > > > + lock xadd dword [rcx], eax
> > > > > > > + dec eax
> > > > > > > ret
> > > > > > > -
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > > ncrement.c
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > > ncrement.c
> > > > > > > deleted file mode 100644
> > > > > > > index bbd1384602..0000000000
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > > ncrement.c
> > > > > > > +++ /dev/null
> > > > > > > @@ -1,46 +0,0 @@
> > > > > > > -/** @file
> > > > > > > - InterLockedIncrement function
> > > > > > > -
> > > > > > > - Copyright (c) 2006 - 2016, Intel
> Corporation.
> > > All rights
> > > > > > > reserved.<BR>
> > > > > > > - This program and the accompanying
> materials
> > > > > > > - are licensed and made available under the
> > > terms and conditions
> > > > > > > of the BSD License
> > > > > > > - which accompanies this distribution. The
> > > full text of the
> > > > > > > license may be found at
> > > > > > > - http://opensource.org/licenses/bsd-
> > > license.php.
> > > > > > > -
> > > > > > > - THE PROGRAM IS DISTRIBUTED UNDER THE BSD
> > > LICENSE ON AN "AS IS"
> > > > > > > BASIS,
> > > > > > > - WITHOUT WARRANTIES OR REPRESENTATIONS OF
> ANY
> > > KIND, EITHER
> > > > > > EXPRESS
> > > > > > > OR IMPLIED.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -
> > > > > > > -/**
> > > > > > > - Microsoft Visual Studio 7.1 Function
> > > Prototypes for I/O Intrinsics.
> > > > > > > -**/
> > > > > > > -
> > > > > > > -long _InterlockedIncrement(
> > > > > > > - long * lpAddend
> > > > > > > -);
> > > > > > > -
> > > > > > > -#pragma intrinsic(_InterlockedIncrement)
> > > > > > > -
> > > > > > > -/**
> > > > > > > - Performs an atomic increment of an 32-bit
> > > unsigned integer.
> > > > > > > -
> > > > > > > - Performs an atomic increment of the 32-
> bit
> > > unsigned integer
> > > > > > > specified by
> > > > > > > - Value and returns the incremented value.
> The
> > > increment
> > > > > > > operation must be
> > > > > > > - performed using MP safe mechanisms. The
> state
> > > of the return
> > > > > > > value is not
> > > > > > > - guaranteed to be MP safe.
> > > > > > > -
> > > > > > > - @param Value A pointer to the 32-bit
> value
> > > to increment.
> > > > > > > -
> > > > > > > - @return The incremented value.
> > > > > > > -
> > > > > > > -**/
> > > > > > > -UINT32
> > > > > > > -EFIAPI
> > > > > > > -InternalSyncIncrement (
> > > > > > > - IN volatile UINT32 *Value
> > > > > > > - )
> > > > > > > -{
> > > > > > > - return _InterlockedIncrement ((long
> > > *)(UINTN)(Value)); -}
> > > > > > > -
> > > > > > > diff --git
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > > ncrement.nasm
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > > ncrement.nasm
> > > > > > > index 7f877b5774..77379d998e 100644
> > > > > > > ---
> > > > > > >
> > >
> a/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > > ncrement.nasm
> > > > > > > +++
> > > > > > >
> > >
> b/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedI
> > > > > > > ncrement.nasm
> > > > > > > @@ -33,7 +33,8 @@
> > > > > > > ;------------------------------------------
> ----
> > > --------
> > > > > > > ------------------------
> > > > > > > global ASM_PFX(InternalSyncIncrement)
> > > > > > > ASM_PFX(InternalSyncIncrement):
> > > > > > > - lock inc dword [rcx]
> > > > > > > - mov eax, [rcx]
> > > > > > > + mov eax, 1
> > > > > > > + lock xadd dword [rcx], eax
> > > > > > > + inc eax
> > > > > > > ret
> > > > > > >
> > > > > > > --
> > > > > > > 2.16.1.windows.1
> > > >
> > > > _______________________________________________
> > > > edk2-devel mailing list
> > > > edk2-devel@lists.01.org
> > > > https://lists.01.org/mailman/listinfo/edk2-devel
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2018-09-12 15:14 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-09-10 10:06 [PATCH] MdePkg/SynchronizationLib: fix Interlocked[De|In]crement return value Ruiyu Ni
2018-09-10 11:37 ` Yao, Jiewen
2018-09-10 14:59 ` Ni, Ruiyu
2018-09-10 15:17 ` Yao, Jiewen
2018-09-10 16:38 ` Kinney, Michael D
2018-09-11 2:25 ` Ni, Ruiyu
2018-09-11 2:26 ` Ni, Ruiyu
2018-09-12 2:16 ` Ni, Ruiyu
2018-09-12 14:53 ` Kinney, Michael D
2018-09-12 15:08 ` Gao, Liming
2018-09-12 15:12 ` Kinney, Michael D
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