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- #------------------------------------------------------------------------------
- #
- # 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:
- #
- #------------------------------------------------------------------------------
- #.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
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