MdePkg: Replace Opcode with the corresponding instructions.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3790

Replace Opcode with the corresponding instructions.
The code changes have been verified with CompareBuild.py tool, which
can be used to compare the results of two different EDK II builds to
determine if they generate the same binaries.
(tool link: https://github.com/mdkinney/edk2/tree/sandbox/CompareBuild)

Signed-off-by: Jason Lou <yun.lou@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem64.nasm b/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem64.nasm
index f517e1d23a..fcc44294a8 100644
--- a/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem64.nasm
+++ b/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem64.nasm
@@ -1,6 +1,6 @@
 ;------------------------------------------------------------------------------

 ;

-; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>

+; Copyright (c) 2006 - 2022, Intel Corporation. All rights reserved.<BR>

 ; SPDX-License-Identifier: BSD-2-Clause-Patent

 ;

 ; Module Name:

@@ -28,11 +28,11 @@
 ;------------------------------------------------------------------------------

 global ASM_PFX(InternalMemSetMem64)

 ASM_PFX(InternalMemSetMem64):

-    DB      0x49, 0xf, 0x6e, 0xc0         ; movd mm0, r8 (Value)

+    movq    mm0, r8

     mov     rax, rcx                    ; rax <- Buffer

     xchg    rcx, rdx                    ; rcx <- Count

 .0:

-    DB      0xf, 0xe7, 0x2              ; movntq  [rdx], mm0

+    movntq  [rdx], mm0

     add     rdx, 8

     loop    .0

     mfence