1#------------------------------------------------------------------------------
2#
3# Copyright (c) 2006, 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), %ecx
38    movl    %ecx, %edx
39    shrl    $3, %ecx
40    jz      L_ZeroBytes
41    pxor    %mm0, %mm0
42L0:
43    movq    %mm0, (%edi)
44    addl    $8, %edi
45    loop    L0
46L_ZeroBytes:
47    andl    $7, %edx
48    xorl    %eax, %eax
49    movl    %edx, %ecx
50    rep
51    stosb
52    movl    8(%esp), %eax
53    pop     %edi
54    ret
55