summary refs log tree commit diff
path: root/sysdeps/i386/i686/multiarch/strcpy.S
blob: 54e5b24fe7f624f6980d8c97b5ca76168fcbf986 (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
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.  */
#if IS_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