mirror of https://github.com/acidanthera/audk.git
77 lines
2.1 KiB
ArmAsm
77 lines
2.1 KiB
ArmAsm
#------------------------------------------------------------------------------
|
|
#
|
|
# Copyright (c) 2006, 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:
|
|
#
|
|
# SetMem.asm
|
|
#
|
|
# Abstract:
|
|
#
|
|
# SetMem function
|
|
#
|
|
# Notes:
|
|
#
|
|
#------------------------------------------------------------------------------
|
|
|
|
.686:
|
|
#.MODEL flat,C
|
|
.xmm:
|
|
.code:
|
|
|
|
#------------------------------------------------------------------------------
|
|
# VOID *
|
|
# _mem_SetMem (
|
|
# IN VOID *Buffer,
|
|
# IN UINTN Count,
|
|
# IN UINT8 Value
|
|
# )
|
|
#------------------------------------------------------------------------------
|
|
.global _InternalMemSetMem
|
|
_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 @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
|
|
@SetBytes:
|
|
movl %edx, %ecx
|
|
rep
|
|
stosb
|
|
movl 8(%esp), %eax # eax <- Buffer as return value
|
|
pop %edi
|
|
ret
|