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| author | Jordan Justen <jordan.l.justen@intel.com> | 2016-05-30 18:52:12 -0700 |
|---|---|---|
| committer | Liming Gao <liming.gao@intel.com> | 2016-06-28 09:51:34 +0800 |
| commit | 733c293541a530b3686c298076519eb84ecd8f72 (patch) | |
| tree | c5e57bd63db3471a6c4c5c15bac9ee84feeec1ab /MdePkg | |
| parent | 861b36d34f1ca198a4509b0a6e439daf4505998c (diff) | |
| download | edk2-733c293541a530b3686c298076519eb84ecd8f72.tar.gz edk2-733c293541a530b3686c298076519eb84ecd8f72.tar.bz2 edk2-733c293541a530b3686c298076519eb84ecd8f72.zip | |
MdePkg BaseMemoryLibSse2: 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')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf | 2 | ||||
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm | 84 |
2 files changed, 86 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf index 89056bdf1f..87e1c1e2f5 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf +++ b/MdePkg/Library/BaseMemoryLibSse2/BaseMemoryLibSse2.inf @@ -65,6 +65,7 @@ Ia32/SetMem16.S
Ia32/SetMem.nasm
Ia32/SetMem.S
+ Ia32/CopyMem.nasm
Ia32/CopyMem.S
Ia32/ScanMem64.nasm
Ia32/ScanMem64.asm
@@ -86,6 +87,7 @@ Ia32/SetMem16.asm
Ia32/SetMem.nasm
Ia32/SetMem.asm
+ Ia32/CopyMem.nasm
Ia32/CopyMem.asm
[Sources.X64]
diff --git a/MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm b/MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm new file mode 100644 index 0000000000..967b636c31 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibSse2/Ia32/CopyMem.nasm @@ -0,0 +1,84 @@ +;------------------------------------------------------------------------------
+;
+; 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 *
+; 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:
+ xor ecx, ecx
+ sub ecx, edi
+ and ecx, 15 ; ecx + edi aligns on 16-byte boundary
+ jz .1
+ cmp ecx, edx
+ cmova ecx, edx
+ sub edx, ecx ; edx <- remaining bytes to copy
+ rep movsb
+.1:
+ mov ecx, edx
+ and edx, 15
+ shr ecx, 4 ; ecx <- # of DQwords to copy
+ jz @CopyBytes
+ add esp, -16
+ movdqu [esp], xmm0 ; save xmm0
+.2:
+ movdqu xmm0, [esi] ; esi may not be 16-bytes aligned
+ movntdq [edi], xmm0 ; edi should be 16-bytes aligned
+ add esi, 16
+ add edi, 16
+ loop .2
+ mfence
+ movdqu xmm0, [esp] ; restore xmm0
+ add esp, 16 ; 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] ; eax <- Destination as return value
+ pop edi
+ pop esi
+ ret
+
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