sysdeps/powerpc/powerpc64/multiarch/memset.c

   1 /* Multiple versions of memset.
   2    Copyright (C) 2013-2022 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 /* 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 # ifdef __LITTLE_ENDIAN__
  37 extern __typeof (__redirect_memset) __memset_power10 attribute_hidden;
  38 # endif
  39
  40 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
  41    ifunc symbol properly.  */
  42 libc_ifunc (__libc_memset,
  43 # ifdef __LITTLE_ENDIAN__
  44             (hwcap2 & PPC_FEATURE2_ARCH_3_1
  45              && hwcap2 & PPC_FEATURE2_HAS_ISEL
  46              && hwcap & PPC_FEATURE_HAS_VSX
  47              && GLRO(dl_cache_line_size) == 128)
  48             ? __memset_power10 :
  49 # endif
  50             (hwcap2 & PPC_FEATURE2_ARCH_2_07
  51              && hwcap & PPC_FEATURE_HAS_ALTIVEC
  52              && GLRO(dl_cache_line_size) == 128)
  53             ? __memset_power8 :
  54               (hwcap & PPC_FEATURE_ARCH_2_06
  55                && GLRO(dl_cache_line_size) == 128)
  56               ? __memset_power7 :
  57                 (hwcap & PPC_FEATURE_ARCH_2_05
  58                  && GLRO(dl_cache_line_size) == 128)
  59                 ? __memset_power6 :
  60                   (hwcap & PPC_FEATURE_POWER4
  61                    && GLRO(dl_cache_line_size) == 128)
  62                   ? __memset_power4
  63             : __memset_ppc);
  64
  65 #undef memset
  66 strong_alias (__libc_memset, memset);
  67 libc_hidden_ver (__libc_memset, memset);
  68 #endif