audk/MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem.S

68 lines
1.9 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), %ecx # ecx <- Count
movl 8(%esp), %edi # edi <- Buffer
movl %ecx, %edx
shrl $3, %ecx # # of Qwords to set
movb 16(%esp), %al # al <- Value
jz @SetBytes
movb %al, %ah # ax <- Value | (Value << 8)
pushl %ecx
pushl %ecx
movq %mm0, (%esp) # save mm0
movd %eax, %mm0
pshufw $0x0,%mm0,%mm0
L0:
movntq %mm0, (%edi)
addl $8, %edi
loop L0
mfence
movq (%esp), %mm0 # restore mm0
popl %ecx # stack cleanup
popl %ecx
@SetBytes:
andl $7, %edx
movl %edx, %ecx
rep
stosb
movl 8(%esp), %eax # eax <- Buffer as return value
pop %edi
ret