sysdeps/powerpc/powerpc64/multiarch/memcpy.c

   1 /* Multiple versions of memcpy. 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 the definition in lib and for
  20    DSO.  In static binaries we need memcpy before the initialization
  21    happened.  */
  22 #if defined SHARED && IS_IN (libc)
  23 /* Redefine memcpy so that the compiler won't complain about the type
  24    mismatch with the IFUNC selector in strong_alias, below.  */
  25 # undef memcpy
  26 # define memcpy __redirect_memcpy
  27 # include <string.h>
  28 # include "init-arch.h"
  29
  30 extern __typeof (__redirect_memcpy) __libc_memcpy;
  31
  32 extern __typeof (__redirect_memcpy) __memcpy_ppc attribute_hidden;
  33 extern __typeof (__redirect_memcpy) __memcpy_power4 attribute_hidden;
  34 extern __typeof (__redirect_memcpy) __memcpy_cell attribute_hidden;
  35 extern __typeof (__redirect_memcpy) __memcpy_power6 attribute_hidden;
  36 extern __typeof (__redirect_memcpy) __memcpy_a2 attribute_hidden;
  37 extern __typeof (__redirect_memcpy) __memcpy_power7 attribute_hidden;
  38 extern __typeof (__redirect_memcpy) __memcpy_power8_cached attribute_hidden;
  39 # if defined __LITTLE_ENDIAN__
  40 extern __typeof (__redirect_memcpy) __memcpy_power10 attribute_hidden;
  41 # endif
  42
  43 libc_ifunc (__libc_memcpy,
  44 # if defined __LITTLE_ENDIAN__
  45             (hwcap2 & PPC_FEATURE2_ARCH_3_1 && hwcap & PPC_FEATURE_HAS_VSX)
  46             ? __memcpy_power10 :
  47 # endif
  48             (hwcap2 & PPC_FEATURE2_ARCH_2_07
  49              && hwcap & PPC_FEATURE_HAS_ALTIVEC
  50              && use_cached_memopt)
  51             ? __memcpy_power8_cached :
  52               (hwcap & PPC_FEATURE_ARCH_2_06
  53                && hwcap & PPC_FEATURE_HAS_ALTIVEC)
  54               ? __memcpy_power7 :
  55                 (hwcap & PPC_FEATURE_ARCH_2_06)
  56                 ? __memcpy_a2 :
  57                   (hwcap & PPC_FEATURE_ARCH_2_05)
  58                   ? __memcpy_power6 :
  59                     (hwcap & PPC_FEATURE_CELL_BE)
  60                     ? __memcpy_cell :
  61                       (hwcap & PPC_FEATURE_POWER4)
  62                       ? __memcpy_power4
  63             : __memcpy_ppc);
  64
  65 #undef memcpy
  66 strong_alias (__libc_memcpy, memcpy);
  67 libc_hidden_ver (__libc_memcpy, memcpy);
  68 #endif