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
|
/* Multiple versions of strcat
Copyright (C) 2011 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include <init-arch.h>
#ifndef USE_AS_STRNCAT
# ifndef STRCAT
# define STRCAT strcat
# endif
#endif
#ifdef USE_AS_STRNCAT
# define STRCAT_SSSE3 __strncat_ssse3
# define STRCAT_SSE2 __strncat_sse2
# define STRCAT_IA32 __strncat_ia32
# define __GI_STRCAT __GI_strncat
#else
# define STRCAT_SSSE3 __strcat_ssse3
# define STRCAT_SSE2 __strcat_sse2
# define STRCAT_IA32 __strcat_ia32
# define __GI_STRCAT __GI_strcat
#endif
/* Define multiple versions only for the definition in libc. Don't
define multiple versions for strncat in static library since we
need strncat before the initialization happened. */
#ifndef NOT_IN_libc
# ifdef SHARED
.section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits
.globl __i686.get_pc_thunk.bx
.hidden __i686.get_pc_thunk.bx
.p2align 4
.type __i686.get_pc_thunk.bx,@function
__i686.get_pc_thunk.bx:
movl (%esp), %ebx
ret
.text
ENTRY(STRCAT)
.type STRCAT, @gnu_indirect_function
pushl %ebx
cfi_adjust_cfa_offset (4)
cfi_rel_offset (ebx, 0)
call __i686.get_pc_thunk.bx
addl $_GLOBAL_OFFSET_TABLE_, %ebx
cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
jne 1f
call __init_cpu_features
1: leal STRCAT_IA32@GOTOFF(%ebx), %eax
testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx)
jz 2f
leal STRCAT_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 STRCAT_SSSE3@GOTOFF(%ebx), %eax
2: popl %ebx
cfi_adjust_cfa_offset (-4)
cfi_restore (ebx)
ret
END(STRCAT)
# else
ENTRY(STRCAT)
.type STRCAT, @gnu_indirect_function
cmpl $0, KIND_OFFSET+__cpu_features
jne 1f
call __init_cpu_features
1: leal STRCAT_IA32, %eax
testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features
jz 2f
leal STRCAT_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 STRCAT_SSSE3, %eax
2: ret
END(STRCAT)
# endif
# undef ENTRY
# define ENTRY(name) \
.type STRCAT_IA32, @function; \
.align 16; \
STRCAT_IA32: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size STRCAT_IA32, .-STRCAT_IA32
# ifdef SHARED
# undef libc_hidden_builtin_def
/* It doesn't make sense to send libc-internal strcat 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_STRCAT; __GI_STRCAT = STRCAT_IA32
# undef libc_hidden_def
# define libc_hidden_def(name) \
.globl __GI___STRCAT; __GI___STRCAT = STRCAT_IA32
# endif
#endif
#ifndef USE_AS_STRNCAT
# include "../../i486/strcat.S"
#endif
|