;------------------------------------------------------------------------------

;

; 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:

;

; ZeroMem.asm

;

; Abstract:

;

; ZeroMem function

;

; Notes:

;

;------------------------------------------------------------------------------

.code

;------------------------------------------------------------------------------

; VOID *

; InternalMemZeroMem (

; IN VOID *Buffer,

; IN UINTN Count

; );

;------------------------------------------------------------------------------

InternalMemZeroMem PROC USES rdi

mov rdi, rcx

mov rcx, rdx

mov r8, rdi

and edx, 7

shr rcx, 3

jz @ZeroBytes

DB 0fh, 0efh, 0c0h ; pxor mm0, mm0

@@:

DB 0fh, 0e7h, 7 ; movntq [rdi], mm0

add rdi, 8

loop @B

DB 0fh, 0aeh, 0f0h ; mfence

@ZeroBytes:

xor eax, eax

mov ecx, edx

rep stosb

mov rax, r8

ret

InternalMemZeroMem ENDP

END