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# ZeroMem.asm 15# 16# Abstract: 17# 18# ZeroMem function 19# 20# Notes: 21# 22#------------------------------------------------------------------------------ 23 24ASM_GLOBAL ASM_PFX(InternalMemZeroMem) 25 26#------------------------------------------------------------------------------ 27# VOID * 28# EFIAPI 29# InternalMemZeroMem ( 30# IN VOID *Buffer, 31# IN UINTN Count 32# ); 33#------------------------------------------------------------------------------ 34ASM_PFX(InternalMemZeroMem): 35 push %edi 36 movl 8(%esp), %edi 37 movl 12(%esp), %edx 38 xorl %ecx, %ecx 39 subl %edi, %ecx 40 xorl %eax, %eax 41 andl $15, %ecx 42 jz L0 43 cmpl %edx, %ecx 44 cmova %edx, %ecx 45 subl %ecx, %edx 46 rep 47 stosb 48L0: 49 movl %edx, %ecx 50 andl $15, %edx 51 shrl $4, %ecx 52 jz L_ZeroBytes 53 pxor %xmm0, %xmm0 54L1: 55 movntdq %xmm0, (%edi) 56 addl $16, %edi 57 loop L1 58 mfence 59L_ZeroBytes: 60 movl %edx, %ecx 61 rep 62 stosb 63 movl 8(%esp), %eax 64 pop %edi 65 ret 66