sysdeps/powerpc/powerpc64/multiarch/strlen.c

   1 /* Multiple versions of strlen. PowerPC64 version.
   2    Copyright (C) 2013-2017 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 #if defined SHARED && IS_IN (libc)
  20 /* Redefine strlen so that the compiler won't complain about the type
  21    mismatch with the IFUNC selector in strong_alias, below.  */
  22 # undef strlen
  23 # define strlen __redirect_strlen
  24 # include <string.h>
  25 # include <shlib-compat.h>
  26 # include "init-arch.h"
  27
  28 extern __typeof (__redirect_strlen) __libc_strlen;
  29
  30 extern __typeof (__redirect_strlen) __strlen_ppc attribute_hidden;
  31 extern __typeof (__redirect_strlen) __strlen_power7 attribute_hidden;
  32 extern __typeof (__redirect_strlen) __strlen_power8 attribute_hidden;
  33
  34 libc_ifunc (__libc_strlen,
  35             (hwcap2 & PPC_FEATURE2_ARCH_2_07)
  36             ? __strlen_power8 :
  37               (hwcap & PPC_FEATURE_HAS_VSX)
  38               ? __strlen_power7
  39               : __strlen_ppc);
  40
  41 #undef strlen
  42 strong_alias (__libc_strlen, strlen)
  43 libc_hidden_ver (__libc_strlen, strlen)
  44 #endif