audk/EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/x64/EfiZeroMemRep8.asm

45 lines
1.2 KiB
NASM

;------------------------------------------------------------------------------
;
; Copyright (c) 2007, 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:
;
; EfiZeroMemRep8.asm
;
; Abstract:
;
; ZeroMem function
;
; Notes:
;
;------------------------------------------------------------------------------
.code
;------------------------------------------------------------------------------
; VOID
; EfiCommonLibZeroMem (
; IN VOID *Buffer,
; IN UINTN Size
; );
;------------------------------------------------------------------------------
EfiCommonLibZeroMem PROC USES rdi
xor rax, rax
mov rdi, rcx
mov rcx, rdx
shr rcx, 3
and rdx, 7
rep stosq
mov rcx, rdx
rep stosb
ret
EfiCommonLibZeroMem ENDP
END