audk/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.asm

60 lines
1.5 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:
;
; SetMem32.asm
;
; Abstract:
;
; SetMem32 function
;
; Notes:
;
;------------------------------------------------------------------------------
.686
.model flat,C
.xmm
.code
;------------------------------------------------------------------------------
; VOID *
; _mem_SetMem32 (
; IN VOID *Buffer,
; IN UINTN Count,
; IN UINT32 Value
; )
;------------------------------------------------------------------------------
InternalMemSetMem32 PROC USES edi
mov edx, [esp + 12]
mov edi, [esp + 8]
mov ecx, edx
shr ecx, 1
movd mm0, [esp + 16]
mov eax, edi
jz @SetDwords
pshufw mm0, mm0, 44h
@@:
movntq [edi], mm0
add edi, 8
loop @B
mfence
@SetDwords:
test dl, 1
jz @F
movd [edi], mm0
@@:
ret
InternalMemSetMem32 ENDP
END