about summary refs log tree commit diff
path: root/sysdeps/i386/i686/multiarch/bcopy.S
blob: e767d970193a36f59fc2a0a24bc9e782e5154f4f (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
/* Multiple versions of bcopy
   All versions must be listed in ifunc-impl-list.c.
   Copyright (C) 2010-2015 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>

/* Define multiple versions only for the definition in lib.  */
#if IS_IN (libc)
# ifdef SHARED
	.text
ENTRY(bcopy)
	.type	bcopy, @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	__bcopy_ia32@GOTOFF(%ebx), %eax
	testl	$bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx)
	jz	2f
	leal	__bcopy_sse2_unaligned@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	__bcopy_ssse3@GOTOFF(%ebx), %eax
	testl	$bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx)
	jz	2f
	leal	__bcopy_ssse3_rep@GOTOFF(%ebx), %eax
2:	popl	%ebx
	cfi_adjust_cfa_offset (-4)
	cfi_restore (ebx)
	ret
END(bcopy)
# else
	.text
ENTRY(bcopy)
	.type	bcopy, @gnu_indirect_function
	cmpl	$0, KIND_OFFSET+__cpu_features
	jne	1f
	call	__init_cpu_features
1:	leal	__bcopy_ia32, %eax
	testl	$bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features
	jz	2f
	leal	__bcopy_ssse3, %eax
	testl	$bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features
	jz	2f
	leal	__bcopy_ssse3_rep, %eax
2:	ret
END(bcopy)
# endif

# undef ENTRY
# define ENTRY(name) \
	.type __bcopy_ia32, @function; \
	.p2align 4; \
	.globl __bcopy_ia32; \
	.hidden __bcopy_ia32; \
	__bcopy_ia32: cfi_startproc; \
	CALL_MCOUNT
# undef END
# define END(name) \
	cfi_endproc; .size __bcopy_ia32, .-__bcopy_ia32

#endif

#include "../bcopy.S"