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 memcmp
Copyright (C) 2010, 2012 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>
/* Define multiple versions only for the definition in libc. */
#ifndef NOT_IN_libc
# ifdef SHARED
.text
ENTRY(memcmp)
.type memcmp, @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 __memcmp_ia32@GOTOFF(%ebx), %eax
testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
jz 2f
leal __memcmp_ssse3@GOTOFF(%ebx), %eax
testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features@GOTOFF(%ebx)
jz 2f
leal __memcmp_sse4_2@GOTOFF(%ebx), %eax
2: popl %ebx
cfi_adjust_cfa_offset (-4)
cfi_restore (ebx)
ret
END(memcmp)
# else
.text
ENTRY(memcmp)
.type memcmp, @gnu_indirect_function
cmpl $0, KIND_OFFSET+__cpu_features
jne 1f
call __init_cpu_features
1: leal __memcmp_ia32, %eax
testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features
jz 2f
leal __memcmp_ssse3, %eax
testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features
jz 2f
leal __memcmp_sse4_2, %eax
2: ret
END(memcmp)
# endif
# undef ENTRY
# define ENTRY(name) \
.type __memcmp_ia32, @function; \
.p2align 4; \
__memcmp_ia32: cfi_startproc; \
CALL_MCOUNT
# undef END
# define END(name) \
cfi_endproc; .size __memcmp_ia32, .-__memcmp_ia32
# ifdef SHARED
# undef libc_hidden_builtin_def
/* IFUNC doesn't work with the hidden functions in shared library since
they will be called without setting up EBX needed for PLT which is
used by IFUNC. */
# define libc_hidden_builtin_def(name) \
.globl __GI_memcmp; __GI_memcmp = __memcmp_ia32
# endif
#endif
#include "../memcmp.S"
|
