[edk2-devel] [PATCH v2 3/5] MdePkg/BaseLib: use normal register init in ARM SetJump implementations

["Leif Lindholm" <quic_llindhol@quicinc.com>]

There may be architectures on which there are benefits to
  eor r0, r0(, r0)
but ARM was never one of them. Change to more readable
  mov r0, #0
instead.

Signed-off-by: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Sami Mujawar <sami.mujawar@arm.com>
---
 MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S   | 2 +-
 MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S
index e4c1946a28ff..e91320252255 100644
--- a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S
+++ b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S
@@ -33,7 +33,7 @@ GCC_ASM_EXPORT(InternalLongJump)
 ASM_PFX(SetJump):
   mov   r3, r13
   stmia r0, {r3-r12,r14}
-  eor   r0, r0, r0
+  mov   r0, #0
   bx    lr
 
 #/**
diff --git a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm
index e1eff758f7ab..ef02d85e0e66 100644
--- a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm
+++ b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm
@@ -33,7 +33,7 @@
 SetJump
   MOV  R3, R13
   STM  R0, {R3-R12,R14}
-  EOR  R0, R0
+  MOV  RO, #0
   BX   LR
 
 ;/**
-- 
2.30.2



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#109078): https://edk2.groups.io/g/devel/message/109078
Mute This Topic: https://groups.io/mt/101600809/7686176
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/leave/12367111/7686176/1913456212/xyzzy [rebecca@openfw.io]
-=-=-=-=-=-=-=-=-=-=-=-