sysdeps/x86_64/multiarch/dl-symbol-redir-ifunc.h

   1 /* Symbol rediretion for loader/static initialization code.
   2    Copyright (C) 2022-2024 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 #ifndef _DL_IFUNC_GENERIC_H
  20 #define _DL_IFUNC_GENERIC_H
  21
  22 #ifndef SHARED
  23
  24 #include <isa-level.h>
  25
  26 #if MINIMUM_X86_ISA_LEVEL >= 4
  27 # define HAVE_MEMSET_IFUNC_GENERIC "__memset_evex_unaligned"
  28 #elif MINIMUM_X86_ISA_LEVEL == 3
  29 # define HAVE_MEMSET_IFUNC_GENERIC "__memset_avx2_unaligned"
  30 #else
  31 # define HAVE_MEMSET_IFUNC_GENERIC "__memset_sse2_unaligned"
  32 #endif
  33
  34 asm ("memset = " HAVE_MEMSET_IFUNC_GENERIC);
  35
  36
  37 #if MINIMUM_X86_ISA_LEVEL >= 4
  38 # define HAVE_MEMCMP_IFUNC_GENERIC "__memcmp_evex_movbe"
  39 #elif MINIMUM_X86_ISA_LEVEL == 3
  40 # define HAVE_MEMCMP_IFUNC_GENERIC "__memcmp_avx2_movbe"
  41 #else
  42 # define HAVE_MEMCMP_IFUNC_GENERIC "__memcmp_sse2"
  43 #endif
  44
  45 asm ("memcmp = " HAVE_MEMCMP_IFUNC_GENERIC);
  46
  47 #endif /* SHARED */
  48
  49 #endif