#------------------------------------------------------------------------------

#

# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>

# 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:

#

# SetMem.asm

#

# Abstract:

#

# SetMem function

#

# Notes:

#

#------------------------------------------------------------------------------

.686:

#.MODEL flat,C

.xmm:

.code:

#------------------------------------------------------------------------------

# VOID *

# _mem_SetMem (

# IN VOID *Buffer,

# IN UINTN Count,

# IN UINT8 Value

# );

#------------------------------------------------------------------------------

ASM_GLOBAL ASM_PFX(InternalMemSetMem)

ASM_PFX(InternalMemSetMem):

push %edi

movl 12(%esp), %edx # edx <- Count

movl 8(%esp), %edi # edi <- Buffer

movb 16(%esp), %al # al <- Value

xorl %ecx, %ecx

subl %edi, %ecx

andl $15, %ecx # ecx + edi aligns on 16-byte boundary

jz L0

cmpl %edx, %ecx

cmova %edx, %ecx

subl %ecx, %edx

rep

stosb

L0:

movl %edx, %ecx

andl $15, %edx

shrl $4, %ecx # ecx <- # of DQwords to set

jz L_SetBytes

movb %al, %ah # ax <- Value | (Value << 8)

addl $-16, %esp

movdqu %xmm0, (%esp)

movd %eax, %xmm0

pshuflw $0, %xmm0, %xmm0

movlhps %xmm0, %xmm0

L1:

movntdq %xmm0, (%edi)

addl $16, %edi

loop L1

mfence

movdqu (%esp), %xmm0

addl $16, %esp # stack cleanup

L_SetBytes:

movl %edx, %ecx

rep

stosb

movl 8(%esp), %eax # eax <- Buffer as return value

pop %edi

ret