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6e3b8c47 | 1 | #------------------------------------------------------------------------------ |
2 | # | |
3 | # Copyright (c) 2006, Intel Corporation | |
4 | # All rights reserved. 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 | ||
b7089db1 | 24 | .globl _InternalMemZeroMem |
6e3b8c47 | 25 | |
26 | #------------------------------------------------------------------------------ | |
27 | # VOID * | |
eb227e96 | 28 | # EFIAPI |
29 | # InternalMemZeroMem ( | |
6e3b8c47 | 30 | # IN VOID *Buffer, |
31 | # IN UINTN Count | |
eb227e96 | 32 | # ); |
6e3b8c47 | 33 | #------------------------------------------------------------------------------ |
6e3b8c47 | 34 | _InternalMemZeroMem: |
35 | push %edi | |
36 | movl 8(%esp), %edi | |
37 | movl 12(%esp), %ecx | |
38 | movl %ecx, %edx | |
39 | shrl $3, %ecx | |
b7089db1 | 40 | jz L_ZeroBytes |
6e3b8c47 | 41 | pxor %mm0, %mm0 |
eb227e96 | 42 | L0: |
43 | movq %mm0, (%edi) | |
6e3b8c47 | 44 | addl $8, %edi |
45 | loop L0 | |
b7089db1 | 46 | L_ZeroBytes: |
6e3b8c47 | 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 |