sysdeps/s390/memrchr.c

   1 /* Multiple versions of memrchr.
   2    Copyright (C) 2015-2023 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-memrchr.h>
  20
  21 #if HAVE_MEMRCHR_IFUNC
  22 # define __memrchr __redirect_memrchr
  23 # include <string.h>
  24 # undef __memrchr
  25 # include <ifunc-resolve.h>
  26
  27 # if HAVE_MEMRCHR_C
  28 extern __typeof (__redirect_memrchr) MEMRCHR_C attribute_hidden;
  29 # endif
  30
  31 # if HAVE_MEMRCHR_Z13
  32 extern __typeof (__redirect_memrchr) MEMRCHR_Z13 attribute_hidden;
  33 # endif
  34
  35 s390_libc_ifunc_expr (__redirect_memrchr, __memrchr,
  36                       (HAVE_MEMRCHR_Z13 && (hwcap & HWCAP_S390_VX))
  37                       ? MEMRCHR_Z13
  38                       : MEMRCHR_DEFAULT
  39                       )
  40 weak_alias (__memrchr, memrchr)
  41 #endif /* HAVE_MEMRCHR_IFUNC  */