diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/CompilerStub/X64/memcpySSE2.asm')
| -rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/CompilerStub/X64/memcpySSE2.asm | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/CompilerStub/X64/memcpySSE2.asm b/EdkCompatibilityPkg/Foundation/Library/CompilerStub/X64/memcpySSE2.asm deleted file mode 100644 index 5d294ae614..0000000000 --- a/EdkCompatibilityPkg/Foundation/Library/CompilerStub/X64/memcpySSE2.asm +++ /dev/null @@ -1,80 +0,0 @@ -;------------------------------------------------------------------------------
-;
-; Copyright (c) 2007, 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.asm
-;
-; Abstract:
-;
-; memcpy function
-;
-; Notes:
-;
-;------------------------------------------------------------------------------
-
- .code
-
-;------------------------------------------------------------------------------
-; VOID *
-; memcpy (
-; OUT VOID *DestinationBuffer,
-; IN CONST VOID *SourceBuffer,
-; IN UINTN Length
-; );
-;------------------------------------------------------------------------------
-memcpy PROC USES rsi rdi
- mov rax, rcx ; rax <- Destination as return value
- cmp rdx, rcx ; if Source == Destination, do nothing
- je @CopyMemDone
- cmp r8, 0 ; if Count == 0, do nothing
- je @CopyMemDone
- mov rsi, rdx ; rsi <- Source
- mov rdi, rcx ; rdi <- Destination
- lea r9, [rsi + r8 - 1] ; r9 <- Last byte of Source
- cmp rsi, rdi
- jae @F ; Copy forward if Source > Destination
- cmp r9, rdi ; Overlapped?
- jae @CopyBackward ; Copy backward if overlapped
-@@:
- xor rcx, rcx
- sub rcx, rdi ; rcx <- -rdi
- and rcx, 15 ; rcx + rsi should be 16 bytes aligned
- jz @F ; skip if rcx == 0
- cmp rcx, r8
- cmova rcx, r8
- sub r8, rcx
- rep movsb
-@@:
- mov rcx, r8
- and r8, 15
- shr rcx, 4 ; rcx <- # of DQwords to copy
- jz @CopyBytes
-@@:
- movdqu xmm0, [rsi] ; rsi may not be 16-byte aligned
- movdqa [rdi], xmm0 ; rdi should be 16-byte aligned
- add rsi, 16
- add rdi, 16
- loop @B
- jmp @CopyBytes ; copy remaining bytes
-@CopyBackward:
- mov rsi, r9 ; rsi <- Last byte of Source
- lea rdi, [rdi + r8 - 1] ; rdi <- Last byte of Destination
- std
-@CopyBytes:
- mov rcx, r8
- rep movsb
- cld
-@CopyMemDone:
- ret
-memcpy ENDP
-
- END
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