sysdeps/s390/memcmp.c

   1 /* Multiple versions of memcmp.
   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-memcmp.h>
  20 #if HAVE_MEMCMP_IFUNC
  21 # define memcmp __redirect_memcmp
  22 # include <string.h>
  23 # undef memcmp
  24 # include <ifunc-resolve.h>
  25
  26 # if HAVE_MEMCMP_Z900_G5
  27 extern __typeof (__redirect_memcmp) MEMCMP_Z900_G5 attribute_hidden;
  28 # endif
  29
  30 # if HAVE_MEMCMP_Z10
  31 extern __typeof (__redirect_memcmp) MEMCMP_Z10 attribute_hidden;
  32 # endif
  33
  34 # if HAVE_MEMCMP_Z196
  35 extern __typeof (__redirect_memcmp) MEMCMP_Z196 attribute_hidden;
  36 # endif
  37
  38 s390_libc_ifunc_expr (__redirect_memcmp, memcmp,
  39                       ({
  40                         s390_libc_ifunc_expr_stfle_init ();
  41                         (HAVE_MEMCMP_Z196 && S390_IS_Z196 (stfle_bits))
  42                           ? MEMCMP_Z196
  43                           : (HAVE_MEMCMP_Z10 && S390_IS_Z10 (stfle_bits))
  44                           ? MEMCMP_Z10
  45                           : MEMCMP_DEFAULT;
  46                       })
  47                       )
  48 weak_alias (memcmp, bcmp);
  49 strong_alias (memcmp, __memcmpeq)
  50 libc_hidden_def (__memcmpeq)
  51 #endif