1#------------------------------------------------------------------------------ 2# 3# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> 4# This program and the accompanying materials 5# are licensed and made available under the terms and conditions of the BSD License 6# which accompanies this distribution. The full text of the license may be found at 7# http://opensource.org/licenses/bsd-license.php. 8# 9# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11# 12# Module Name: 13# 14# SetMem.asm 15# 16# Abstract: 17# 18# SetMem function 19# 20# Notes: 21# 22#------------------------------------------------------------------------------ 23 24 25 #.MODEL flat,C 26 .xmm: 27 .code: 28 29#------------------------------------------------------------------------------ 30# VOID * 31# _mem_SetMem ( 32# IN VOID *Buffer, 33# IN UINTN Count, 34# IN UINT8 Value 35# ); 36#------------------------------------------------------------------------------ 37ASM_GLOBAL ASM_PFX(InternalMemSetMem) 38ASM_PFX(InternalMemSetMem): 39 push %edi 40 movl 12(%esp), %edx # edx <- Count 41 movl 8(%esp), %edi # edi <- Buffer 42 movb 16(%esp), %al # al <- Value 43 xorl %ecx, %ecx 44 subl %edi, %ecx 45 andl $15, %ecx # ecx + edi aligns on 16-byte boundary 46 jz L0 47 cmpl %edx, %ecx 48 cmova %edx, %ecx 49 subl %ecx, %edx 50 rep 51 stosb 52L0: 53 movl %edx, %ecx 54 andl $15, %edx 55 shrl $4, %ecx # ecx <- # of DQwords to set 56 jz L_SetBytes 57 movb %al, %ah # ax <- Value | (Value << 8) 58 addl $-16, %esp 59 movdqu %xmm0, (%esp) 60 movd %eax, %xmm0 61 pshuflw $0, %xmm0, %xmm0 62 movlhps %xmm0, %xmm0 63L1: 64 movntdq %xmm0, (%edi) 65 addl $16, %edi 66 loop L1 67 mfence 68 movdqu (%esp), %xmm0 69 addl $16, %esp # stack cleanup 70L_SetBytes: 71 movl %edx, %ecx 72 rep 73 stosb 74 movl 8(%esp), %eax # eax <- Buffer as return value 75 pop %edi 76 ret 77