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;------------------------------------------------------------------------------
;
; 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:
;
; SetMem.asm
;
; Abstract:
;
; SetMem function
;
; Notes:
;
;------------------------------------------------------------------------------
.686
.model flat,C
.xmm
.code
;------------------------------------------------------------------------------
; VOID *
; _mem_SetMem (
; IN VOID *Buffer,
; IN UINTN Count,
; IN UINT8 Value
; )
;------------------------------------------------------------------------------
InternalMemSetMem PROC USES edi
mov ecx, [esp + 12] ; ecx <- Count
mov edi, [esp + 8] ; edi <- Buffer
mov edx, ecx
shr ecx, 3 ; # of Qwords to set
mov al, [esp + 16] ; al <- Value
jz @SetBytes
mov ah, al ; ax <- Value | (Value << 8)
push ecx
push ecx
movq [esp], mm0 ; save mm0
movd mm0, eax
pshufw mm0, mm0, 0 ; fill mm0 with 8 Value's
@@:
movntq [edi], mm0
add edi, 8
loop @B
mfence
movq mm0, [esp] ; restore mm0
pop ecx ; stack cleanup
pop ecx
@SetBytes:
and edx, 7
mov ecx, edx
rep stosb
mov eax, [esp + 8] ; eax <- Buffer as return value
ret
InternalMemSetMem ENDP
END
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