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| author | Jordan Justen <jordan.l.justen@intel.com> | 2016-05-30 18:52:07 -0700 |
|---|---|---|
| committer | Liming Gao <liming.gao@intel.com> | 2016-06-28 09:50:41 +0800 |
| commit | eadcb0a18f05b30c750d579b0103209d87a50a58 (patch) | |
| tree | 8fd124a3225def35ec57a14c0b861d290aa9a478 /MdePkg/Library/BaseMemoryLibMmx/X64 | |
| parent | 9692aa20603eeb477c24b14652fa3e93443fa6d1 (diff) | |
| download | edk2-eadcb0a18f05b30c750d579b0103209d87a50a58.tar.gz edk2-eadcb0a18f05b30c750d579b0103209d87a50a58.tar.bz2 edk2-eadcb0a18f05b30c750d579b0103209d87a50a58.zip | |
MdePkg BaseMemoryLibMmx: Convert X64/CopyMem.asm to NASM
The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
X64/CopyMem.asm to X64/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/X64')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibMmx/X64/CopyMem.nasm | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibMmx/X64/CopyMem.nasm b/MdePkg/Library/BaseMemoryLibMmx/X64/CopyMem.nasm new file mode 100644 index 0000000000..5be37f93c8 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibMmx/X64/CopyMem.nasm @@ -0,0 +1,74 @@ +;------------------------------------------------------------------------------
+;
+; 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:
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID *
+; EFIAPI
+; InternalMemCopyMem (
+; OUT VOID *DestinationBuffer,
+; IN CONST VOID *SourceBuffer,
+; IN UINTN Length
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalMemCopyMem)
+ASM_PFX(InternalMemCopyMem):
+ push rsi
+ push rdi
+ mov rsi, rdx ; rsi <- Source
+ mov rdi, rcx ; rdi <- Destination
+ lea r9, [rsi + r8 - 1] ; r9 <- End of Source
+ cmp rsi, rdi
+ mov rax, rdi ; rax <- Destination as return value
+ jae .0
+ cmp r9, rdi
+ jae @CopyBackward ; Copy backward if overlapped
+.0:
+ mov rcx, r8
+ and r8, 7
+ shr rcx, 3 ; rcx <- # of Qwords to copy
+ jz @CopyBytes
+ DB 0x49, 0xf, 0x7e, 0xc2 ; movd r10, mm0 (Save mm0 in r10)
+.1:
+ DB 0xf, 0x6f, 0x6 ; movd mm0, [rsi]
+ DB 0xf, 0xe7, 0x7 ; movntq [rdi], mm0
+ add rsi, 8
+ add rdi, 8
+ loop .1
+ mfence
+ DB 0x49, 0xf, 0x6e, 0xc2 ; movd mm0, r10 (Restore mm0)
+ jmp @CopyBytes
+@CopyBackward:
+ mov rsi, r9 ; rsi <- End of Source
+ lea rdi, [rdi + r8 - 1] ; rdi <- End of Destination
+ std ; set direction flag
+@CopyBytes:
+ mov rcx, r8
+ rep movsb ; Copy bytes backward
+ cld
+ pop rdi
+ pop rsi
+ ret
+
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