sysdeps/powerpc/powerpc64/multiarch/memcpy.c

   1 /* Multiple versions of memcpy. PowerPC64 version.
   2    Copyright (C) 2013-2014 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 /* 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 && !defined NOT_IN_libc
  23 # include <string.h>
  24 # include <shlib-compat.h>
  25 # include "init-arch.h"
  26
  27 extern __typeof (memcpy) __memcpy_ppc attribute_hidden;
  28 extern __typeof (memcpy) __memcpy_power4 attribute_hidden;
  29 extern __typeof (memcpy) __memcpy_cell attribute_hidden;
  30 extern __typeof (memcpy) __memcpy_power6 attribute_hidden;
  31 extern __typeof (memcpy) __memcpy_a2 attribute_hidden;
  32 extern __typeof (memcpy) __memcpy_power7 attribute_hidden;
  33
  34 /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
  35    ifunc symbol properly.  */
  36 libc_ifunc (memcpy,
  37             (hwcap & PPC_FEATURE_HAS_VSX)
  38             ? __memcpy_power7 :
  39               (hwcap & PPC_FEATURE_ARCH_2_06)
  40               ? __memcpy_a2 :
  41                 (hwcap & PPC_FEATURE_ARCH_2_05)
  42                 ? __memcpy_power6 :
  43                   (hwcap & PPC_FEATURE_CELL_BE)
  44                   ? __memcpy_cell :
  45                     (hwcap & PPC_FEATURE_POWER4)
  46                     ? __memcpy_power4
  47             : __memcpy_ppc);
  48 #endif