;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> | |
; SPDX-License-Identifier: BSD-2-Clause-Patent | |
; | |
; Module Name: | |
; | |
; SetMem64.nasm | |
; | |
; Abstract: | |
; | |
; SetMem64 function | |
; | |
; Notes: | |
; | |
;------------------------------------------------------------------------------ | |
DEFAULT REL | |
SECTION .text | |
;------------------------------------------------------------------------------ | |
; VOID * | |
; InternalMemSetMem64 ( | |
; IN VOID *Buffer, | |
; IN UINTN Count, | |
; IN UINT64 Value | |
; ) | |
;------------------------------------------------------------------------------ | |
global ASM_PFX(InternalMemSetMem64) | |
ASM_PFX(InternalMemSetMem64): | |
mov rax, rcx ; rax <- Buffer | |
xchg rcx, rdx ; rcx <- Count & rdx <- Buffer | |
test dl, 8 | |
movq xmm0, r8 | |
jz .0 | |
mov [rdx], r8 | |
add rdx, 8 | |
dec rcx | |
.0: | |
push rbx | |
mov rbx, rcx | |
and rbx, 7 | |
shr rcx, 3 | |
jz @SetQwords | |
movlhps xmm0, xmm0 | |
.1: | |
movntdq [rdx], xmm0 | |
movntdq [rdx + 16], xmm0 | |
movntdq [rdx + 32], xmm0 | |
movntdq [rdx + 48], xmm0 | |
lea rdx, [rdx + 64] | |
loop .1 | |
mfence | |
@SetQwords: | |
push rdi | |
mov rcx, rbx | |
mov rax, r8 | |
mov rdi, rdx | |
rep stosq | |
pop rdi | |
.2: | |
pop rbx | |
ret | |