blob: 36e4412fad1f2a76cdf992dfebf2dc78d6de77c7 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* strcpy/strcpy optimized with stosb.
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#define PARMS 4+8 /* space for 2 saved regs */
#define DEST PARMS
#define SRC DEST+4
#ifndef USE_AS_STPCPY
# define STRCPY __strcpy_stosb
#endif
.text
ENTRY (STRCPY)
pushl %edi
cfi_adjust_cfa_offset (4)
cfi_rel_offset (%edi, 4)
pushl %esi
cfi_adjust_cfa_offset (4)
cfi_rel_offset (%esi, 0)
movl DEST(%esp), %edi
movl SRC(%esp), %esi
#ifndef USE_AS_STPCPY
movl %edi, %edx
#endif
L(repeat):
lodsb
stosb
testb %al,%al
jne L(repeat)
#ifdef USE_AS_STPCPY
leal -1(%edi), %eax
#else
movl %edx, %eax
#endif
popl %esi
cfi_adjust_cfa_offset (-4)
cfi_restore (%esi)
popl %edi
cfi_adjust_cfa_offset (-4)
cfi_restore (%edi)
ret
END (STRCPY)
|
