mirror of https://github.com/acidanthera/audk.git
63 lines
1.9 KiB
NASM
63 lines
1.9 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:
|
||
|
|
;
|
||
|
|
; SetMem.asm
|
||
|
|
;
|
||
|
|
; Abstract:
|
||
|
|
;
|
||
|
|
; memset function
|
||
|
|
;
|
||
|
|
; Notes:
|
||
|
|
;
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
.code
|
||
|
|
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
; VOID *
|
||
|
|
; memset (
|
||
|
|
; OUT VOID *Buffer, --> rcx
|
||
|
|
; IN UINT8 Value, --> rdx
|
||
|
|
; IN UINTN Length --> r8
|
||
|
|
; );
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
memset PROC USES rdi
|
||
|
|
mov rax, rcx
|
||
|
|
cmp r8, 0 ; if Size == 0, do nothing
|
||
|
|
je @SetDone
|
||
|
|
mov rax, rdx ; rdx <-> r8
|
||
|
|
mov rdx, r8 ; rdx <- Length
|
||
|
|
mov r8, rax ; r8 <- Value
|
||
|
|
mov ah, al
|
||
|
|
DB 48h, 0fh, 6eh, 0c0h ; movd mm0, rax
|
||
|
|
mov r8, rcx
|
||
|
|
mov rdi, r8 ; rdi <- Buffer
|
||
|
|
mov rcx, rdx
|
||
|
|
and edx, 7
|
||
|
|
shr rcx, 3
|
||
|
|
jz @SetBytes
|
||
|
|
DB 0fh, 70h, 0C0h, 00h ; pshufw mm0, mm0, 0h
|
||
|
|
@@:
|
||
|
|
DB 48h, 0fh, 7eh, 07h ; movd [rdi], mm0
|
||
|
|
add rdi, 8
|
||
|
|
loop @B
|
||
|
|
@SetBytes:
|
||
|
|
mov ecx, edx
|
||
|
|
rep stosb
|
||
|
|
mov rax, r8
|
||
|
|
@SetDone:
|
||
|
|
ret
|
||
|
|
memset ENDP
|
||
|
|
|
||
|
|
END
|