sysdeps/powerpc/powerpc64/multiarch/memcmp.c

   1 /* Multiple versions of memcmp. PowerPC64 version.
   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 /* Define multiple versions only for definition in libc.  */
  20 #if IS_IN (libc)
  21 # define memcmp __redirect_memcmp
  22 # include <string.h>
  23 # include <shlib-compat.h>
  24 # include "init-arch.h"
  25
  26 extern __typeof (memcmp) __memcmp_ppc attribute_hidden;
  27 extern __typeof (memcmp) __memcmp_power4 attribute_hidden;
  28 extern __typeof (memcmp) __memcmp_power7 attribute_hidden;
  29 extern __typeof (memcmp) __memcmp_power8 attribute_hidden;
  30 extern __typeof (memcmp) __memcmp_power10 attribute_hidden;
  31 # undef memcmp
  32
  33 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
  34    ifunc symbol properly.  */
  35 libc_ifunc_redirected (__redirect_memcmp, memcmp,
  36 #ifdef __LITTLE_ENDIAN__
  37                                 (hwcap2 & PPC_FEATURE2_ARCH_3_1
  38                                  && hwcap & PPC_FEATURE_HAS_VSX)
  39                                  ? __memcmp_power10 :
  40 #endif
  41                        (hwcap2 & PPC_FEATURE2_ARCH_2_07
  42                         && hwcap & PPC_FEATURE_HAS_ALTIVEC)
  43                        ? __memcmp_power8 :
  44                        (hwcap & PPC_FEATURE_ARCH_2_06)
  45                        ? __memcmp_power7
  46                        : (hwcap & PPC_FEATURE_POWER4)
  47                          ? __memcmp_power4
  48                          : __memcmp_ppc);
  49 #else
  50 #include <string/memcmp.c>
  51 #endif