mirror of https://github.com/acidanthera/audk.git
51 lines
1.1 KiB
NASM
51 lines
1.1 KiB
NASM
;------------------------------------------------------------------------------
|
|
;
|
|
; Copyright (c) 2006 - 2022, Intel Corporation. All rights reserved.<BR>
|
|
; SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
;
|
|
; Module Name:
|
|
;
|
|
; ZeroMem.nasm
|
|
;
|
|
; Abstract:
|
|
;
|
|
; ZeroMem function
|
|
;
|
|
; Notes:
|
|
;
|
|
;------------------------------------------------------------------------------
|
|
|
|
DEFAULT REL
|
|
SECTION .text
|
|
|
|
;------------------------------------------------------------------------------
|
|
; VOID *
|
|
; InternalMemZeroMem (
|
|
; IN VOID *Buffer,
|
|
; IN UINTN Count
|
|
; );
|
|
;------------------------------------------------------------------------------
|
|
global ASM_PFX(InternalMemZeroMem)
|
|
ASM_PFX(InternalMemZeroMem):
|
|
push rdi
|
|
mov rdi, rcx
|
|
mov rcx, rdx
|
|
mov r8, rdi
|
|
and edx, 7
|
|
shr rcx, 3
|
|
jz @ZeroBytes
|
|
pxor mm0, mm0
|
|
.0:
|
|
movntq [rdi], mm0
|
|
add rdi, 8
|
|
loop .0
|
|
mfence
|
|
@ZeroBytes:
|
|
xor eax, eax
|
|
mov ecx, edx
|
|
rep stosb
|
|
mov rax, r8
|
|
pop rdi
|
|
ret
|
|
|