mirror of https://github.com/acidanthera/audk.git
61 lines
1.7 KiB
NASM
61 lines
1.7 KiB
NASM
;------------------------------------------------------------------------------
|
|
;
|
|
; 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:
|
|
;
|
|
; SetMem.nasm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; SetMem function
|
|
;
|
|
; Notes:
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
DEFAULT REL
|
|
SECTION .text
|
|
|
|
;------------------------------------------------------------------------------
|
|
; VOID *
|
|
; EFIAPI
|
|
; InternalMemSetMem (
|
|
; OUT VOID *Buffer,
|
|
; IN UINTN Length,
|
|
; IN UINT8 Value
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
global ASM_PFX(InternalMemSetMem)
|
|
ASM_PFX(InternalMemSetMem):
|
|
push rdi
|
|
mov rax, r8
|
|
mov ah, al
|
|
DB 0x48, 0xf, 0x6e, 0xc0 ; movd mm0, rax
|
|
mov r8, rcx
|
|
mov rdi, r8 ; rdi <- Buffer
|
|
mov rcx, rdx
|
|
and edx, 7
|
|
shr rcx, 3
|
|
jz @SetBytes
|
|
DB 0xf, 0x70, 0xC0, 0x0 ; pshufw mm0, mm0, 0h
|
|
.0:
|
|
DB 0xf, 0xe7, 0x7 ; movntq [rdi], mm0
|
|
add rdi, 8
|
|
loop .0
|
|
mfence
|
|
@SetBytes:
|
|
mov ecx, edx
|
|
rep stosb
|
|
mov rax, r8
|
|
pop rdi
|
|
ret
|
|
|