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
|
/* Multiple versions of strcat
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2009-2014 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>
#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_SSE2_UNALIGNED __strncat_sse2_unaligned
# define __GI_STRCAT __GI_strncat
# define __GI___STRCAT __GI___strncat
#else
# define STRCAT_SSSE3 __strcat_ssse3
# define STRCAT_SSE2 __strcat_sse2
# define STRCAT_SSE2_UNALIGNED __strcat_sse2_unaligned
# define __GI_STRCAT __GI_strcat
# define __GI___STRCAT __GI___strcat
#endif
/* Define multiple versions only for the definition in libc. */
#if IS_IN (libc)
.text
ENTRY(STRCAT)
.type STRCAT, @gnu_indirect_function
cmpl $0, __cpu_features+KIND_OFFSET(%rip)
jne 1f
call __init_cpu_features
1: leaq STRCAT_SSE2_UNALIGNED(%rip), %rax
testl $bit_Fast_Unaligned_Load, __cpu_features+FEATURE_OFFSET+index_Fast_Unaligned_Load(%rip)
jnz 2f
leaq STRCAT_SSE2(%rip), %rax
testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
jz 2f
leaq STRCAT_SSSE3(%rip), %rax
2: ret
END(STRCAT)
# undef ENTRY
# define ENTRY(name) \
.type STRCAT_SSE2, @function; \
.align 16; \
.globl STRCAT_SSE2; \
.hidden STRCAT_SSE2; \
STRCAT_SSE2: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size STRCAT_SSE2, .-STRCAT_SSE2
# 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_SSE2
# undef libc_hidden_def
# define libc_hidden_def(name) \
.globl __GI___STRCAT; __GI___STRCAT = STRCAT_SSE2
#endif
#ifndef USE_AS_STRNCAT
# include "../strcat.S"
#endif
|
GitWeb