sysdeps/x86_64/multiarch/memmove.c

   1 /* Multiple versions of memmove.
   2    Copyright (C) 2010, 2011
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <string.h>
  22
  23 #ifndef NOT_IN_libc
  24 #include <shlib-compat.h>
  25 #include "init-arch.h"
  26
  27 #define MEMMOVE __memmove_sse2
  28 #ifdef SHARED
  29 # undef libc_hidden_builtin_def
  30 # define libc_hidden_builtin_def(name) \
  31   __hidden_ver1 (__memmove_sse2, __GI_memmove, __memmove_sse2);
  32 #endif
  33 #endif
  34
  35 extern __typeof (memmove) __memmove_sse2 attribute_hidden;
  36 extern __typeof (memmove) __memmove_ssse3 attribute_hidden;
  37 extern __typeof (memmove) __memmove_ssse3_back attribute_hidden;
  38
  39 #include "string/memmove.c"
  40
  41 #ifndef NOT_IN_libc
  42 libc_ifunc (memmove,
  43             HAS_SSSE3
  44             ? (HAS_FAST_COPY_BACKWARD
  45                ? __memmove_ssse3_back : __memmove_ssse3)
  46             : __memmove_sse2);
  47
  48 #if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
  49 compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5);
  50 #endif
  51 #endif