1/* strncpy variant information on S/390 version.
2 Copyright (C) 2018-2022 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#if defined USE_MULTIARCH && IS_IN (libc) \
20 && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
21# define HAVE_STRNCPY_IFUNC 1
22#else
23# define HAVE_STRNCPY_IFUNC 0
24#endif
25
26#ifdef HAVE_S390_VX_ASM_SUPPORT
27# define HAVE_STRNCPY_IFUNC_AND_VX_SUPPORT HAVE_STRNCPY_IFUNC
28#else
29# define HAVE_STRNCPY_IFUNC_AND_VX_SUPPORT 0
30#endif
31
32#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
33# define STRNCPY_DEFAULT STRNCPY_Z13
34# define HAVE_STRNCPY_Z900_G5 0
35# define HAVE_STRNCPY_Z13 1
36#else
37# define STRNCPY_DEFAULT STRNCPY_Z900_G5
38# define HAVE_STRNCPY_Z900_G5 1
39# define HAVE_STRNCPY_Z13 HAVE_STRNCPY_IFUNC_AND_VX_SUPPORT
40#endif
41
42#if HAVE_STRNCPY_Z900_G5
43# define STRNCPY_Z900_G5 __strncpy_default
44#else
45# define STRNCPY_Z900_G5 NULL
46#endif
47
48#if HAVE_STRNCPY_Z13
49# define STRNCPY_Z13 __strncpy_vx
50#else
51# define STRNCPY_Z13 NULL
52#endif
53

source code of glibc/sysdeps/s390/ifunc-strncpy.h