MdePkg/Library/BaseMemoryLibMmx/Ia32/ZeroMem.S File Reference
Detailed Description
#------------------------------------------------------------------------------
#
# 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:
#
#
ZeroMem.asm
#
# Abstract:
#
# ZeroMem function
#
# Notes:
#
#------------------------------------------------------------------------------
ASM_GLOBAL
ASM_PFX(InternalMemZeroMem)
#------------------------------------------------------------------------------
# VOID *
# EFIAPI
# InternalMemZeroMem (
# IN VOID *Buffer,
# IN UINTN Count
# );
#------------------------------------------------------------------------------
ASM_PFX(InternalMemZeroMem):
push edi
movl 8(esp), edi
movl 12(esp), ecx
movl ecx, edx
shrl $3, ecx
jz L_ZeroBytes
pxor mm0, mm0
L0:
movq mm0, (edi)
addl $8, edi
loop L0
L_ZeroBytes:
andl $7, edx
xorl eax, eax
movl edx, ecx
rep
stosb
movl 8(esp), eax
pop edi
ret