1/* Multiple versions of strncmp.
2 Copyright (C) 2015-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <ifunc-strncmp.h>
20
21#if HAVE_STRNCMP_IFUNC
22# define strncmp __redirect_strncmp
23/* Omit the strncmp inline definitions because it would redefine strncmp. */
24# define __NO_STRING_INLINES
25# include <string.h>
26# undef strncmp
27# include <ifunc-resolve.h>
28
29# if HAVE_STRNCMP_C
30extern __typeof (__redirect_strncmp) STRNCMP_C attribute_hidden;
31# endif
32
33# if HAVE_STRNCMP_Z13
34extern __typeof (__redirect_strncmp) STRNCMP_Z13 attribute_hidden;
35# endif
36
37s390_libc_ifunc_expr (__redirect_strncmp, strncmp,
38 (HAVE_STRNCMP_Z13 && (hwcap & HWCAP_S390_VX))
39 ? STRNCMP_Z13
40 : STRNCMP_DEFAULT
41 )
42#endif /* HAVE_STRNCMP_IFUNC */
43

source code of glibc/sysdeps/s390/strncmp.c