sysdeps/powerpc/powerpc64/multiarch/memmove.c

   1 /* Multiple versions of memmove. PowerPC64 version.
   2    Copyright (C) 2014-2022 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 the definition in lib and for
  20    DSO.  In static binaries we need memmove before the initialization
  21    happened.  */
  22 #if defined SHARED && IS_IN (libc)
  23 /* Redefine memmove so that the compiler won't complain about the type
  24    mismatch with the IFUNC selector in strong_alias, below.  */
  25 # undef memmove
  26 # define memmove __redirect_memmove
  27 # include <string.h>
  28 # include "init-arch.h"
  29
  30 extern __typeof (__redirect_memmove) __libc_memmove;
  31 extern __typeof (__redirect_memmove) __memmove_ppc attribute_hidden;
  32 extern __typeof (__redirect_memmove) __memmove_power7 attribute_hidden;
  33 #ifdef __LITTLE_ENDIAN__
  34 extern __typeof (__redirect_memmove) __memmove_power10 attribute_hidden;
  35 #endif
  36
  37 libc_ifunc (__libc_memmove,
  38 #ifdef __LITTLE_ENDIAN__
  39             (hwcap2 & PPC_FEATURE2_ARCH_3_1
  40              && hwcap2 & PPC_FEATURE2_HAS_ISEL
  41              && hwcap & PPC_FEATURE_HAS_VSX)
  42             ? __memmove_power10 :
  43 #endif
  44                      (hwcap & PPC_FEATURE_ARCH_2_06
  45                       && hwcap & PPC_FEATURE_HAS_ALTIVEC)
  46                      ? __memmove_power7
  47                      : __memmove_ppc);
  48
  49 #undef memmove
  50 strong_alias (__libc_memmove, memmove);
  51 libc_hidden_ver (__libc_memmove, memmove);
  52 #else
  53 # include <string/memmove.c>
  54 #endif