[PATCH 4/6] ArmPkg/Library/CompilerIntrinsicsLib: Enable VS2017/ARM builds

[Pete Batard <pete@akeo.ie>]

Introduce CRT assembly replacements for __rt_sdiv, __rt_udiv,
__rt_udiv64, __rt_sdiv64, __rt_srsh, memcpy and memset.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Pete Batard <pete@akeo.ie>
---
 ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtdiv.asm             | 255 ++++++++++++++++++++
 ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtsrsh.asm            |  45 ++++
 ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf |  13 +-
 ArmPkg/Library/CompilerIntrinsicsLib/memcpy_ms.c               |  34 +++
 ArmPkg/Library/CompilerIntrinsicsLib/memset_ms.c               |  33 +++
 5 files changed, 378 insertions(+), 2 deletions(-)

diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtdiv.asm b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtdiv.asm
new file mode 100644
index 000000000000..096dc6317318
--- /dev/null
+++ b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtdiv.asm
@@ -0,0 +1,255 @@
+///** @file
+//
+//  This code provides replacement for MSVC CRT division functions
+//
+//  Copyright (c) 2017, Pete Batard. All rights reserved.<BR>
+//  Based on generated assembly of ReactOS' sdk/lib/crt/math/arm/__rt_###div.c,
+//  Copyright (c) Timo Kreuzer. 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.
+//
+//**/
+
+  EXPORT _fltused
+  EXPORT __brkdiv0
+
+  EXPORT __rt_sdiv
+  EXPORT __rt_udiv
+  EXPORT __rt_udiv64
+  EXPORT __rt_sdiv64
+
+  AREA  Math, CODE, READONLY
+
+_fltused
+    dcd 0x9875
+
+__brkdiv0
+    udf #249
+
+//
+// uint64_t __rt_udiv(uint32_t divisor, uint32_t dividend)
+//
+
+__rt_udiv
+  cmp         r0, #0
+  beq         __brkdiv0
+  push        {r3-r5,lr}
+  mov         r5,r0
+  mov         r4,r1
+  cmp         r5,r4
+  it          hi
+  movhi       r0,#0
+  bhi         __rt_udiv_label3
+  clz         r2,r5
+  clz         r3,r4
+  subs        r3,r2,r3
+  movs        r1,#1
+  lsl         r2,r5,r3
+  lsl         r3,r1,r3
+  movs        r0,#0
+__rt_udiv_label1
+  cmp         r4,r2
+  bcc         __rt_udiv_label2
+  orrs        r0,r0,r3
+  subs        r4,r4,r2
+__rt_udiv_label2
+  lsrs        r2,r2,#1
+  lsrs        r3,r3,#1
+  bne         __rt_udiv_label1
+__rt_udiv_label3
+  mov         r1,r4
+  pop         {r3-r5,pc}
+
+//
+// uint64_t __rt_sdiv(int32_t divisor, int32_t dividend)
+//
+
+__rt_sdiv
+  cmp         r0, #0
+  beq         __brkdiv0
+  push        {r4-r6,lr}
+  mov         r4,r1
+  ands        r6,r0,#0x80000000
+  it          ne
+  rsbne       r4,r4,#0
+  mov         r5,r0
+  rsbs        r5,r5,#0
+  cmp         r5,r4
+  it          hi
+  movhi       r0,#0
+  bhi         __rt_sdiv_label3
+  clz         r2,r5
+  clz         r3,r4
+  subs        r3,r2,r3
+  movs        r1,#1
+  lsl         r2,r5,r3
+  lsl         r3,r1,r3
+  movs        r0,#0
+__rt_sdiv_label1
+  cmp         r4,r2
+  bcc         __rt_sdiv_label2
+  orrs        r0,r0,r3
+  subs        r4,r4,r2
+__rt_sdiv_label2
+  lsrs        r2,r2,#1
+  lsrs        r3,r3,#1
+  bne         __rt_sdiv_label1
+__rt_sdiv_label3
+  cbz         r6,__rt_sdiv_label4
+  rsbs        r4,r4,#0
+__rt_sdiv_label4
+  mov         r1,r4
+  pop         {r4-r6,pc}
+
+//
+// typedef struct {
+//   uint64_t quotient;
+//   uint64_t modulus;
+// } udiv64_result_t;
+//
+// void __rt_udiv64_internal(udiv64_result_t *result, uint64_t divisor, uint64_t dividend)
+//
+
+__rt_udiv64_internal
+  orrs        r1,r2,r3
+  beq         __brkdiv0
+  push        {r4-r8,lr}
+  mov         r7,r3
+  mov         r6,r2
+  mov         r4,r0
+  ldrd        r0,r5,[sp,#0x18]
+  cmp         r7,r5
+  bcc         __rt_udiv64_internal_label2
+  bhi         __rt_udiv64_internal_label1
+  cmp         r6,r0
+  bls         __rt_udiv64_internal_label2
+__rt_udiv64_internal_label1
+  movs        r3,#0
+  strd        r3,r3,[r4]
+  b           __rt_udiv64_internal_label8
+__rt_udiv64_internal_label2
+  clz         r2,r7
+  cmp         r2,#0x20
+  bne         __rt_udiv64_internal_label3
+  clz         r3,r6
+  add         r2,r2,r3
+__rt_udiv64_internal_label3
+  clz         r1,r5 ;
+  cmp         r1,#0x20
+  bne         __rt_udiv64_internal_label4
+  clz         r3,r0
+  add         r1,r1,r3
+__rt_udiv64_internal_label4
+  subs        r1,r2,r1
+  rsb         r3,r1,#0x20
+  lsr         r3,r6,r3
+  lsl         r2,r7,r1
+  orrs        r2,r2,r3
+  sub         r3,r1,#0x20
+  lsl         r3,r6,r3
+  orrs        r2,r2,r3
+  lsl         r7,r6,r1
+  sub         r3,r1,#0x20
+  movs        r6,#1
+  lsls        r6,r6,r3
+  movs        r3,#1
+  mov         lr,#0
+  lsl         r1,r3,r1
+  mov         r8,lr
+__rt_udiv64_internal_label5
+  cmp         r5,r2
+  bcc         __rt_udiv64_internal_label7
+  bhi         __rt_udiv64_internal_label6
+  cmp         r0,r7
+  bcc         __rt_udiv64_internal_label7
+__rt_udiv64_internal_label6
+  subs        r0,r0,r7
+  sbcs        r5,r5,r2
+  orr         lr,lr,r1
+  orr         r8,r8,r6
+__rt_udiv64_internal_label7
+  lsls        r3,r2,#0x1F
+  orr         r7,r3,r7,lsr #1
+  lsls        r3,r6,#0x1F
+  orr         r1,r3,r1,lsr #1
+  lsrs        r6,r6,#1
+  lsrs        r2,r2,#1
+  orrs        r3,r1,r6
+  bne         __rt_udiv64_internal_label5
+  strd        lr,r8,[r4]
+__rt_udiv64_internal_label8
+  str         r5,[r4,#0xC]
+  str         r0,[r4,#8]
+  pop         {r4-r8,pc}
+
+//
+// {int64_t, int64_t} __rt_sdiv64(int64_t divisor, int64_t dividend)
+//
+
+__rt_sdiv64
+  push        {r4-r6,lr}
+  sub         sp,sp,#0x18
+  and         r6,r1,#0x80000000
+  movs        r4,r6
+  mov         r5,r0
+  beq         __rt_sdiv64_label1
+  movs        r0,#0
+  rsbs        r2,r2,#0
+  sbc         r3,r0,r3
+__rt_sdiv64_label1
+  movs        r4,r6
+  beq         __rt_sdiv64_label2
+  movs        r0,#0
+  rsbs        r5,r5,#0
+  sbc         r1,r0,r1
+__rt_sdiv64_label2
+  str         r2,[sp]
+  str         r3,[sp,#4]
+  mov         r3,r1
+  mov         r2,r5
+  add         r0,sp,#8
+  bl          __rt_udiv64_internal
+  movs        r3,r6
+  beq         __rt_sdiv64_label3
+  ldrd        r3,r2,[sp,#0x10]
+  movs        r1,#0
+  rsbs        r3,r3,#0
+  sbcs        r1,r1,r2
+  b           __rt_sdiv64_label4
+__rt_sdiv64_label3
+  ldrd        r3,r1,[sp,#0x10]
+__rt_sdiv64_label4
+  mov         r2,r3
+  ldr         r0,[sp,#8]
+  mov         r3,r1
+  ldr         r1,[sp,#0xC]
+  add         sp,sp,#0x18
+  pop         {r4-r6,pc}
+
+//
+// {uint64_t, uint64_t} __rt_udiv64(uint64_t divisor, uint64_t dividend)
+//
+
+__rt_udiv64
+  push        {r4,r5,lr}
+  sub         sp,sp,#0x1C
+  mov         r4,r2
+  mov         r2,r0
+  mov         r5,r3
+  add         r0,sp,#8
+  mov         r3,r1
+  str         r4,[sp]
+  str         r5,[sp,#4]
+  bl          __rt_udiv64_internal
+  ldrd        r2,r3,[sp,#0x10]
+  ldrd        r0,r1,[sp,#8]
+  add         sp,sp,#0x1C
+  pop         {r4,r5,pc}
+
+  END
diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtsrsh.asm b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtsrsh.asm
new file mode 100644
index 000000000000..2332dda823f2
--- /dev/null
+++ b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/rtsrsh.asm
@@ -0,0 +1,45 @@
+///** @file
+//
+//  This code provides replacement for MSVC CRT __rt_srsh
+//
+//  Copyright (c) Timo Kreuzer. 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.
+//
+//**/
+
+  EXPORT  __rt_srsh
+
+  AREA  Math, CODE, READONLY
+
+//
+//  int64_t __rt_srsh(int64_t  value, uint32_t shift);
+//
+
+__rt_srsh
+    rsbs r3, r2, #32
+    bmi __rt_srsh_label1
+    lsr r0, r0, r2
+    lsl r3, r1, r3
+    orr r0, r0, r3
+    asr r1, r1, r2
+    bx  lr
+__rt_srsh_label1
+    cmp r2, 64
+    bhs __rt_srsh_label2
+    sub r3, r2, #32
+    asr r0, r1, r3
+    asr r1, r1, #32
+    bx  lr
+__rt_srsh_label2
+    asr r1, r1, #32
+    mov r0, r1
+    bx  lr
+
+  END
diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf b/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
index 44333141a70a..0dacc5e5117d 100644
--- a/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
+++ b/ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
@@ -23,8 +23,12 @@ [Defines]
   LIBRARY_CLASS                  = CompilerIntrinsicsLib
 
 [Sources]
-  memcpy.c
-  memset.c
+  memcpy.c             | RVCT
+  memcpy.c             | GCC
+  memcpy_ms.c          | MSFT
+  memset.c             | RVCT
+  memset.c             | GCC
+  memset_ms.c          | MSFT
 
 [Sources.ARM]
   Arm/mullu.asm        | RVCT
@@ -94,6 +98,8 @@ [Sources.ARM]
   Arm/llsr.S       | GCC
   Arm/llsl.S       | GCC
 
+  Arm/rtdiv.asm    | MSFT
+  Arm/rtsrsh.asm   | MSFT
 
 [Packages]
   MdePkg/MdePkg.dec
@@ -101,3 +107,6 @@ [Packages]
 
 [LibraryClasses]
 
+[BuildOptions]
+  MSFT:*_*_ARM_CC_FLAGS = /GL-
+  MSFT:*_*_AARCH64_CC_FLAGS = /GL-
diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/memcpy_ms.c b/ArmPkg/Library/CompilerIntrinsicsLib/memcpy_ms.c
new file mode 100644
index 000000000000..90bbbb930d31
--- /dev/null
+++ b/ArmPkg/Library/CompilerIntrinsicsLib/memcpy_ms.c
@@ -0,0 +1,34 @@
+//------------------------------------------------------------------------------
+//
+// Copyright (c) 2017, Pete Batard. 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.
+//
+//------------------------------------------------------------------------------
+
+#if defined(_M_ARM64)
+typedef unsigned __int64  size_t;
+#else
+typedef unsigned __int32  size_t;
+#endif
+
+void* memcpy(void *, const void *, size_t);
+#pragma intrinsic(memcpy)
+#pragma function(memcpy)
+void* memcpy(void *dest, const void *src, size_t n)
+{
+  unsigned char *d = dest;
+  unsigned char const *s = src;
+
+  while (n--)
+    *d++ = *s++;
+
+  return dest;
+}
diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/memset_ms.c b/ArmPkg/Library/CompilerIntrinsicsLib/memset_ms.c
new file mode 100644
index 000000000000..64205e5d1012
--- /dev/null
+++ b/ArmPkg/Library/CompilerIntrinsicsLib/memset_ms.c
@@ -0,0 +1,33 @@
+//------------------------------------------------------------------------------
+//
+// Copyright (c) 2017, Pete Batard. 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.
+//
+//------------------------------------------------------------------------------
+
+#if defined(_M_ARM64)
+typedef unsigned __int64  size_t;
+#else
+typedef unsigned __int32  size_t;
+#endif
+
+void* memset(void *, int, size_t);
+#pragma intrinsic(memset)
+#pragma function(memset)
+void *memset(void *s, int c, size_t n)
+{
+  unsigned char *d = s;
+
+  while (n--)
+    *d++ = (unsigned char)c;
+
+  return s;
+}
-- 
2.9.3.windows.2