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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/* Multiple versions of strcpy
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2011-2014 Free Software Foundation, Inc.
Contributed by Intel Corporation.
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>
#include <init-arch.h>
#if !defined (USE_AS_STPCPY) && !defined (USE_AS_STRNCPY)
# ifndef STRCPY
# define STRCPY strcpy
# endif
#endif
#ifdef USE_AS_STPCPY
# ifdef USE_AS_STRNCPY
# define STRCPY_SSSE3 __stpncpy_ssse3
# define STRCPY_SSE2 __stpncpy_sse2
# define STRCPY_IA32 __stpncpy_ia32
# define __GI_STRCPY __GI_stpncpy
# define __GI___STRCPY __GI___stpncpy
# else
# define STRCPY_SSSE3 __stpcpy_ssse3
# define STRCPY_SSE2 __stpcpy_sse2
# define STRCPY_IA32 __stpcpy_ia32
# define __GI_STRCPY __GI_stpcpy
# define __GI___STRCPY __GI___stpcpy
# endif
#else
# ifdef USE_AS_STRNCPY
# define STRCPY_SSSE3 __strncpy_ssse3
# define STRCPY_SSE2 __strncpy_sse2
# define STRCPY_IA32 __strncpy_ia32
# define __GI_STRCPY __GI_strncpy
# else
# define STRCPY_SSSE3 __strcpy_ssse3
# define STRCPY_SSE2 __strcpy_sse2
# define STRCPY_IA32 __strcpy_ia32
# define __GI_STRCPY __GI_strcpy
# endif
#endif
/* Define multiple versions only for the definition in libc. Don't
define multiple versions for strncpy in static library since we
need strncpy before the initialization happened. */
#ifndef NOT_IN_libc
# ifdef SHARED
.text
ENTRY(STRCPY)
.type STRCPY, @gnu_indirect_function
pushl %ebx
cfi_adjust_cfa_offset (4)
cfi_rel_offset (ebx, 0)
LOAD_PIC_REG(bx)
cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
jne 1f
call __init_cpu_features
1: leal STRCPY_IA32@GOTOFF(%ebx), %eax
testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx)
jz 2f
leal STRCPY_SSE2@GOTOFF(%ebx), %eax
testl $bit_Fast_Unaligned_Load, FEATURE_OFFSET+index_Fast_Unaligned_Load+__cpu_features@GOTOFF(%ebx)
jnz 2f
testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
jz 2f
leal STRCPY_SSSE3@GOTOFF(%ebx), %eax
2: popl %ebx
cfi_adjust_cfa_offset (-4)
cfi_restore (ebx)
ret
END(STRCPY)
# else
ENTRY(STRCPY)
.type STRCPY, @gnu_indirect_function
cmpl $0, KIND_OFFSET+__cpu_features
jne 1f
call __init_cpu_features
1: leal STRCPY_IA32, %eax
testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features
jz 2f
leal STRCPY_SSE2, %eax
testl $bit_Fast_Unaligned_Load, FEATURE_OFFSET+index_Fast_Unaligned_Load+__cpu_features
jnz 2f
testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features
jz 2f
leal STRCPY_SSSE3, %eax
2: ret
END(STRCPY)
# endif
# undef ENTRY
# define ENTRY(name) \
.type STRCPY_IA32, @function; \
.align 16; \
.globl STRCPY_IA32; \
.hidden STRCPY_IA32; \
STRCPY_IA32: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size STRCPY_IA32, .-STRCPY_IA32
# ifdef SHARED
# undef libc_hidden_builtin_def
/* It doesn't make sense to send libc-internal strcpy calls through a PLT.
The speedup we get from using SSSE3 instruction is likely eaten away
by the indirect call in the PLT. */
# define libc_hidden_builtin_def(name) \
.globl __GI_STRCPY; __GI_STRCPY = STRCPY_IA32
# undef libc_hidden_def
# define libc_hidden_def(name) \
.globl __GI___STRCPY; __GI___STRCPY = STRCPY_IA32
# endif
#endif
#ifdef USE_AS_STPCPY
# ifdef USE_AS_STRNCPY
# include "../../stpncpy.S"
# else
# include "../../i586/stpcpy.S"
# endif
#else
# ifndef USE_AS_STRNCPY
# include "../../i586/strcpy.S"
# endif
#endif
|
GitWeb