blob: 00d46d12d0e621e2ddd6f616c4a1f4a893384db1 (
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
|
/* Multiple versions of memset
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2014 Free Software Foundation, Inc.
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/>. */
#ifdef HAVE_AVX2_SUPPORT
#include <sysdep.h>
#include <shlib-compat.h>
#include <init-arch.h>
/* Define multiple versions only for the definition in lib. */
# ifndef NOT_IN_libc
ENTRY(memset)
.type memset, @gnu_indirect_function
cmpl $0, __cpu_features+KIND_OFFSET(%rip)
jne 1f
call __init_cpu_features
1: leaq __memset_sse2(%rip), %rax
testl $bit_AVX2_Usable, __cpu_features+FEATURE_OFFSET+index_AVX2_Usable(%rip)
jz 2f
leaq __memset_avx2(%rip), %rax
2: ret
END(memset)
# endif
# if !defined NOT_IN_libc
# undef memset
# define memset __memset_sse2
# undef __memset_chk
# define __memset_chk __memset_chk_sse2
# ifdef SHARED
# undef libc_hidden_builtin_def
/* It doesn't make sense to send libc-internal memset calls through a PLT.
The speedup we get from using GPR instruction is likely eaten away
by the indirect call in the PLT. */
# define libc_hidden_builtin_def(name) \
.globl __GI_memset; __GI_memset = __memset_sse2
# endif
# undef strong_alias
# define strong_alias(original, alias)
# endif
#endif
#include "../memset.S"
|