sysdeps/powerpc/powerpc64/multiarch/strncmp.c

   1 /* Multiple versions of strncmp.
   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 defined SHARED && IS_IN (libc)
  21 # define strncmp __redirect_strncmp
  22 /* Omit the strncmp inline definitions because it would redefine strncmp.  */
  23 # define __NO_STRING_INLINES
  24 # include <string.h>
  25 # include <shlib-compat.h>
  26 # include "init-arch.h"
  27
  28 extern __typeof (strncmp) __strncmp_ppc attribute_hidden;
  29 extern __typeof (strncmp) __strncmp_power8 attribute_hidden;
  30 # ifdef __LITTLE_ENDIAN__
  31 extern __typeof (strncmp) __strncmp_power9 attribute_hidden;
  32 extern __typeof (strncmp) __strncmp_power10 attribute_hidden;
  33 # endif
  34 # undef strncmp
  35
  36 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
  37    ifunc symbol properly.  */
  38 libc_ifunc_redirected (__redirect_strncmp, strncmp,
  39 # ifdef __LITTLE_ENDIAN__
  40                         (hwcap2 & PPC_FEATURE2_ARCH_3_1
  41                          && hwcap & PPC_FEATURE_HAS_VSX)
  42                         ? __strncmp_power10 :
  43                         (hwcap2 & PPC_FEATURE2_ARCH_3_00
  44                          && hwcap & PPC_FEATURE_HAS_ALTIVEC)
  45                         ? __strncmp_power9 :
  46 # endif
  47                        (hwcap2 & PPC_FEATURE2_ARCH_2_07)
  48                        ? __strncmp_power8
  49                        : __strncmp_ppc);
  50 #endif