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;------------------------------------------------------------------------------
;
; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; 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
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