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;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2022, 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 UINT32 Value
; )
;------------------------------------------------------------------------------
global ASM_PFX(InternalMemSetMem32)
ASM_PFX(InternalMemSetMem32):
movq mm0, r8
mov rax, rcx ; rax <- Buffer
xchg rcx, rdx ; rcx <- Count rdx <- Buffer
shr rcx, 1 ; rcx <- # of qwords to set
jz @SetDwords
pshufw mm0, mm0, 44h
.0:
movntq [rdx], mm0
lea rdx, [rdx + 8] ; use "lea" to avoid flag changes
loop .0
mfence
@SetDwords:
jnc .1
movd [rdx], mm0
.1:
ret
|
