sysdeps/powerpc/powerpc64/multiarch/memset.c

   1 /* Multiple versions of memset.
   2    Copyright (C) 2013-2015 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    <http://www.gnu.org/licenses/>.  */
  18
  19 /* Define multiple versions only for definition in libc.  */
  20 #if defined SHARED && IS_IN (libc)
  21 /* Redefine memset so that the compiler won't complain about the type
  22    mismatch with the IFUNC selector in strong_alias, below.  */
  23 # undef memset
  24 # define memset __redirect_memset
  25 # include <string.h>
  26 # include <shlib-compat.h>
  27 # include "init-arch.h"
  28
  29 extern __typeof (__redirect_memset) __libc_memset;
  30
  31 extern __typeof (__redirect_memset) __memset_ppc attribute_hidden;
  32 extern __typeof (__redirect_memset) __memset_power4 attribute_hidden;
  33 extern __typeof (__redirect_memset) __memset_power6 attribute_hidden;
  34 extern __typeof (__redirect_memset) __memset_power7 attribute_hidden;
  35 extern __typeof (__redirect_memset) __memset_power8 attribute_hidden;
  36
  37 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
  38    ifunc symbol properly.  */
  39 libc_ifunc (__libc_memset,
  40             (hwcap2 & PPC_FEATURE2_ARCH_2_07)
  41             ? __memset_power8 :
  42               (hwcap & PPC_FEATURE_HAS_VSX)
  43               ? __memset_power7 :
  44                 (hwcap & PPC_FEATURE_ARCH_2_05)
  45                 ? __memset_power6 :
  46                   (hwcap & PPC_FEATURE_POWER4)
  47                   ? __memset_power4
  48             : __memset_ppc);
  49
  50 #undef memset
  51 strong_alias (__libc_memset, memset);
  52 libc_hidden_ver (__libc_memset, memset);
  53 #endif