sysdeps/powerpc/powerpc64/multiarch/memchr.c

   1 /* Multiple versions of memchr.
   2    Copyright (C) 2013-2024 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 #if IS_IN (libc)
  20 # include <string.h>
  21 # include <shlib-compat.h>
  22 # include "init-arch.h"
  23
  24 extern __typeof (__memchr) __memchr_ppc attribute_hidden;
  25 extern __typeof (__memchr) __memchr_power7 attribute_hidden;
  26 extern __typeof (__memchr) __memchr_power8 attribute_hidden;
  27
  28 # ifdef __LITTLE_ENDIAN__
  29 extern __typeof (__memchr) __memchr_power10 attribute_hidden;
  30 # endif
  31 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
  32    ifunc symbol properly.  */
  33 libc_ifunc (__memchr,
  34 # ifdef __LITTLE_ENDIAN__
  35             (hwcap2 & PPC_FEATURE2_ARCH_3_1
  36              && hwcap & PPC_FEATURE_HAS_VSX)
  37             ? __memchr_power10 :
  38 # endif
  39               (hwcap2 & PPC_FEATURE2_ARCH_2_07
  40               && hwcap & PPC_FEATURE_HAS_ALTIVEC)
  41               ? __memchr_power8 :
  42                 (hwcap & PPC_FEATURE_ARCH_2_06)
  43                 ? __memchr_power7
  44                 : __memchr_ppc);
  45
  46 weak_alias (__memchr, memchr)
  47 libc_hidden_builtin_def (memchr)
  48 #else
  49 #include <string/memchr.c>
  50 #endif