sysdeps/s390/memcpy.c

   1 /* Multiple versions of memcpy.
   2    Copyright (C) 2015-2019 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-memcpy.h>
  20
  21 #if HAVE_MEMCPY_IFUNC
  22 # define memcpy __redirect_memcpy
  23 # include <string.h>
  24 # undef memcpy
  25 # include <ifunc-resolve.h>
  26
  27 # if HAVE_MEMCPY_Z900_G5
  28 extern __typeof (__redirect_memcpy) MEMCPY_Z900_G5 attribute_hidden;
  29 # endif
  30
  31 # if HAVE_MEMCPY_Z10
  32 extern __typeof (__redirect_memcpy) MEMCPY_Z10 attribute_hidden;
  33 # endif
  34
  35 # if HAVE_MEMCPY_Z196
  36 extern __typeof (__redirect_memcpy) MEMCPY_Z196 attribute_hidden;
  37 # endif
  38
  39 s390_libc_ifunc_expr (__redirect_memcpy, memcpy,
  40                       ({
  41                         s390_libc_ifunc_expr_stfle_init ();
  42                         (HAVE_MEMCPY_Z196 && S390_IS_Z196 (stfle_bits))
  43                           ? MEMCPY_Z196
  44                           : (HAVE_MEMCPY_Z10 && S390_IS_Z10 (stfle_bits))
  45                           ? MEMCPY_Z10
  46                           : MEMCPY_DEFAULT;
  47                       })
  48                       )
  49 #endif