MdePkg/Library/BaseMemoryLibSse2/X64/SetMem64.S File Reference
Detailed Description
#
# ConvertAsm.py: Automatically generated from
SetMem64.asm
#
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
#
http://opensource.org/licenses/bsd-license.php.
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
# Module Name:
#
# SetMem64.S
#
# Abstract:
#
# SetMem64 function
#
# Notes:
#
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# VOID *
# InternalMemSetMem64 (
# IN VOID *Buffer,
# IN UINTN Count,
# IN UINT64 Value
# )
#------------------------------------------------------------------------------
ASM_GLOBAL
ASM_PFX(InternalMemSetMem64)
ASM_PFX(InternalMemSetMem64):
movq rcx, rax # rax <- Buffer
xchgq rdx, rcx # rcx <- Count & rdx <- Buffer
testb $8, dl
movd r8, xmm0
jz L0
movq r8, (rdx)
addq $8, rdx
decq rcx
L0:
shrq $1, rcx
jz L_SetQwords
movlhps xmm0, xmm0
L1:
movntdq xmm0, (rdx)
leaq 16(rdx), rdx
loop L1
mfence
L_SetQwords:
jnc L2
movq r8, (rdx)
L2:
ret