;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> | |
; SPDX-License-Identifier: BSD-2-Clause-Patent | |
; | |
; Module Name: | |
; | |
; SetMem32.nasm | |
; | |
; Abstract: | |
; | |
; SetMem32 function | |
; | |
; Notes: | |
; | |
;------------------------------------------------------------------------------ | |
DEFAULT REL | |
SECTION .text | |
;------------------------------------------------------------------------------ | |
; VOID * | |
; InternalMemSetMem32 ( | |
; IN VOID *Buffer, | |
; IN UINTN Count, | |
; IN UINT8 Value | |
; ) | |
;------------------------------------------------------------------------------ | |
global ASM_PFX(InternalMemSetMem32) | |
ASM_PFX(InternalMemSetMem32): | |
push rdi | |
mov rdi, rcx | |
mov r9, rdi | |
xor rcx, rcx | |
sub rcx, rdi | |
and rcx, 15 | |
mov rax, r8 | |
jz .0 | |
shr rcx, 2 | |
cmp rcx, rdx | |
cmova rcx, rdx | |
sub rdx, rcx | |
rep stosd | |
.0: | |
mov rcx, rdx | |
and edx, 15 | |
shr rcx, 4 | |
jz @SetDwords | |
movd xmm0, eax | |
pshufd xmm0, xmm0, 0 | |
.1: | |
movntdq [rdi], xmm0 | |
movntdq [rdi + 16], xmm0 | |
movntdq [rdi + 32], xmm0 | |
movntdq [rdi + 48], xmm0 | |
add rdi, 64 | |
loop .1 | |
mfence | |
@SetDwords: | |
mov ecx, edx | |
rep stosd | |
mov rax, r9 | |
pop rdi | |
ret | |