audk/MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem64.asm

64 lines
1.6 KiB
NASM

;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation
; All rights reserved. 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:
;
; SetMem64.asm
;
; Abstract:
;
; SetMem64 function
;
; Notes:
;
;------------------------------------------------------------------------------
.686
.model flat,C
.xmm
.code
;------------------------------------------------------------------------------
; VOID *
; _mem_SetMem64 (
; IN VOID *Buffer,
; IN UINTN Count,
; IN UINT64 Value
; )
;------------------------------------------------------------------------------
InternalMemSetMem64 PROC USES edi
mov ecx, [esp + 12]
mov edi, [esp + 8]
test edi, 8
DB 0f2h, 0fh, 12h, 44h, 24h, 16 ; movddup xmm0, [esp + 16]
jz @F
movq [edi], xmm0
add edi, 8
dec ecx
@@:
mov edx, ecx
shr ecx, 1
jz @SetQwords
@@:
movntdq [edi], xmm0
add edi, 16
loop @B
mfence
@SetQwords:
test dl, 1
jz @F
movq [edi], xmm0
@@:
ret
InternalMemSetMem64 ENDP
END