about summary refs log tree commit diff
path: root/sysdeps/aarch64/multiarch/strlen.c
blob: 99f2cf2cde54fd1158383d097ba51edc1377f55b (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
/* Multiple versions of strlen. AARCH64 version.
   Copyright (C) 2018-2020 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
   <https://www.gnu.org/licenses/>.  */

/* Define multiple versions only for the definition in libc.  */

#if IS_IN (libc)
/* Redefine strlen so that the compiler won't complain about the type
   mismatch with the IFUNC selector in strong_alias, below.  */
# undef strlen
# define strlen __redirect_strlen
# include <string.h>
# include <init-arch.h>

#define USE_ASIMD_STRLEN() IS_FALKOR (midr)

extern __typeof (__redirect_strlen) __strlen;

extern __typeof (__redirect_strlen) __strlen_generic attribute_hidden;
extern __typeof (__redirect_strlen) __strlen_asimd attribute_hidden;

libc_ifunc (__strlen,
	    (USE_ASIMD_STRLEN () || IS_KUNPENG920 (midr)
	    ? __strlen_asimd
	    :__strlen_generic));

# undef strlen
strong_alias (__strlen, strlen);
#endif