sysdeps/x86_64/fpu/multiarch/ifunc-mathvec-avx512.h

   1 /* Common definition for libmathvec ifunc selections optimized with
   2    AVX512.
   3    Copyright (C) 2017-2018 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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <init-arch.h>
  21
  22 #undef PASTER2
  23 #define PASTER2(x,y)    x##_##y
  24
  25 extern void REDIRECT_NAME (void);
  26 extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_wrapper) attribute_hidden;
  27 extern __typeof (REDIRECT_NAME) OPTIMIZE (knl) attribute_hidden;
  28 extern __typeof (REDIRECT_NAME) OPTIMIZE (skx) attribute_hidden;
  29
  30 static inline void *
  31 IFUNC_SELECTOR (void)
  32 {
  33   const struct cpu_features* cpu_features = __get_cpu_features ();
  34
  35   if (!CPU_FEATURES_ARCH_P (cpu_features, MathVec_Prefer_No_AVX512))
  36     {
  37       if (CPU_FEATURES_ARCH_P (cpu_features, AVX512DQ_Usable))
  38         return OPTIMIZE (skx);
  39
  40       if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable))
  41         return OPTIMIZE (knl);
  42     }
  43
  44   return OPTIMIZE (avx2_wrapper);
  45 }