sysdeps/x86_64/fpu/multiarch/ifunc-fma.h

   1 /* Common definition for ifunc selections optimized with AVX2/FMA.
   2    Copyright (C) 2017-2019 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 #include <init-arch.h>
  20
  21 extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
  22 extern __typeof (REDIRECT_NAME) OPTIMIZE (fma) attribute_hidden;
  23
  24 static inline void *
  25 IFUNC_SELECTOR (void)
  26 {
  27   const struct cpu_features* cpu_features = __get_cpu_features ();
  28
  29   if (CPU_FEATURES_ARCH_P (cpu_features, FMA_Usable)
  30       && CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable))
  31     return OPTIMIZE (fma);
  32
  33   return OPTIMIZE (sse2);
  34 }