diff options
| author | Jordan Justen <jordan.l.justen@intel.com> | 2016-05-30 18:52:06 -0700 |
|---|---|---|
| committer | Liming Gao <liming.gao@intel.com> | 2016-06-28 09:50:27 +0800 |
| commit | 6fb11b1da27dd85035df985aa005cf902e153945 (patch) | |
| tree | 87bbce63c028437e4dc24916b623dcc6a34e8412 /MdePkg/Library/BaseMemoryLibMmx/Ia32/CopyMem.nasm | |
| parent | 76fd76d6cfb293e712cc12f76dee6b707253d4b4 (diff) | |
| download | edk2-6fb11b1da27dd85035df985aa005cf902e153945.tar.gz edk2-6fb11b1da27dd85035df985aa005cf902e153945.tar.bz2 edk2-6fb11b1da27dd85035df985aa005cf902e153945.zip | |
MdePkg BaseMemoryLibMmx: Convert Ia32/CopyMem.asm to NASM
The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
Ia32/CopyMem.asm to Ia32/CopyMem.nasm
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibMmx/Ia32/CopyMem.nasm')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibMmx/Ia32/CopyMem.nasm | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibMmx/Ia32/CopyMem.nasm b/MdePkg/Library/BaseMemoryLibMmx/Ia32/CopyMem.nasm new file mode 100644 index 0000000000..ae42df017e --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibMmx/Ia32/CopyMem.nasm @@ -0,0 +1,77 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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.
+;
+; Module Name:
+;
+; CopyMem.nasm
+;
+; Abstract:
+;
+; CopyMem function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID *
+; EFIAPI
+; InternalMemCopyMem (
+; IN VOID *Destination,
+; IN VOID *Source,
+; IN UINTN Count
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemCopyMem)
+ASM_PFX(InternalMemCopyMem):
+ push esi
+ push edi
+ mov esi, [esp + 16] ; esi <- Source
+ mov edi, [esp + 12] ; edi <- Destination
+ mov edx, [esp + 20] ; edx <- Count
+ lea eax, [esi + edx - 1] ; eax <- End of Source
+ cmp esi, edi
+ jae .0
+ cmp eax, edi ; Overlapped?
+ jae @CopyBackward ; Copy backward if overlapped
+.0:
+ mov ecx, edx
+ and edx, 7
+ shr ecx, 3 ; ecx <- # of Qwords to copy
+ jz @CopyBytes
+ push eax
+ push eax
+ movq [esp], mm0 ; save mm0
+.1:
+ movq mm0, [esi]
+ movq [edi], mm0
+ add esi, 8
+ add edi, 8
+ loop .1
+ movq mm0, [esp] ; restore mm0
+ pop ecx ; stack cleanup
+ pop ecx ; stack cleanup
+ jmp @CopyBytes
+@CopyBackward:
+ mov esi, eax ; esi <- Last byte in Source
+ lea edi, [edi + edx - 1] ; edi <- Last byte in Destination
+ std
+@CopyBytes:
+ mov ecx, edx
+ rep movsb
+ cld
+ mov eax, [esp + 12]
+ pop edi
+ pop esi
+ ret
+
|