MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem32.S File Reference
Detailed Description
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, 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:
#
#
SetMem32.asm
#
# Abstract:
#
# SetMem32 function
#
# Notes:
#
#------------------------------------------------------------------------------
ASM_GLOBAL
ASM_PFX(InternalMemSetMem32)
#------------------------------------------------------------------------------
# VOID *
# EFIAPI
# InternalMemSetMem32 (
# IN VOID *Buffer,
# IN UINTN Count,
# IN UINT32 Value
# );
#------------------------------------------------------------------------------
ASM_PFX(InternalMemSetMem32):
push edi
movl 12(esp), edx
movl 8(esp), edi
xorl ecx, ecx
subl edi, ecx
andl $15, ecx # ecx + edi aligns on 16-byte boundary
movl 16(esp), eax
jz L0
shrl $2, ecx
cmpl edx, ecx
cmova edx, ecx
subl ecx, edx
rep
stosl
L0:
movl edx, ecx
andl $3, edx
shrl $2, ecx
jz L_SetDwords
movd eax, xmm0
pshufd $0, xmm0, xmm0
L1:
movntdq xmm0, (edi)
addl $16, edi
loop L1
mfence
L_SetDwords:
movl edx, ecx
rep
stosl
movl 8(esp), eax
pop edi
ret