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;------------------------------------------------------------------------------
;
; 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
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