blob: 024f6ef8996166140cf2388d56546cfbf9bac399 (
plain)
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
|
/* Multiple versions of strcpy
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2009-2016 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_SSE2_UNALIGNED __stpncpy_sse2_unaligned
# define __GI_STRCPY __GI_stpncpy
# define __GI___STRCPY __GI___stpncpy
# else
# define STRCPY_SSSE3 __stpcpy_ssse3
# define STRCPY_SSE2 __stpcpy_sse2
# define STRCPY_SSE2_UNALIGNED __stpcpy_sse2_unaligned
# 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_SSE2_UNALIGNED __strncpy_sse2_unaligned
# define __GI_STRCPY __GI_strncpy
# else
# define STRCPY_SSSE3 __strcpy_ssse3
# define STRCPY_SSE2 __strcpy_sse2
# define STRCPY_SSE2_UNALIGNED __strcpy_sse2_unaligned
# define __GI_STRCPY __GI_strcpy
# endif
#endif
/* Define multiple versions only for the definition in libc. */
#if IS_IN (libc)
.text
ENTRY(STRCPY)
.type STRCPY, @gnu_indirect_function
LOAD_RTLD_GLOBAL_RO_RDX
leaq STRCPY_SSE2_UNALIGNED(%rip), %rax
HAS_ARCH_FEATURE (Fast_Unaligned_Load)
jnz 2f
leaq STRCPY_SSE2(%rip), %rax
HAS_CPU_FEATURE (SSSE3)
jz 2f
leaq STRCPY_SSSE3(%rip), %rax
2: ret
END(STRCPY)
# undef ENTRY
# define ENTRY(name) \
.type STRCPY_SSE2, @function; \
.align 16; \
.globl STRCPY_SSE2; \
.hidden STRCPY_SSE2; \
STRCPY_SSE2: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size STRCPY_SSE2, .-STRCPY_SSE2
# 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_SSE2
# undef libc_hidden_def
# define libc_hidden_def(name) \
.globl __GI___STRCPY; __GI___STRCPY = STRCPY_SSE2
#endif
#ifndef USE_AS_STRNCPY
#include "../strcpy.S"
#endif
|
