1  /* Common definition for ifunc selections optimized with AVX, AVX2/FMA
       2     and FMA4.
       3     Copyright (C) 2017-2023 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     <https://www.gnu.org/licenses/>.  */
      19  
      20  #include <init-arch.h>
      21  
      22  extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
      23  extern __typeof (REDIRECT_NAME) OPTIMIZE (avx) attribute_hidden;
      24  extern __typeof (REDIRECT_NAME) OPTIMIZE (fma) attribute_hidden;
      25  extern __typeof (REDIRECT_NAME) OPTIMIZE (fma4) attribute_hidden;
      26  
      27  static inline void *
      28  IFUNC_SELECTOR (void)
      29  {
      30    const struct cpu_features* cpu_features = __get_cpu_features ();
      31  
      32    if (CPU_FEATURE_USABLE_P (cpu_features, FMA)
      33        && CPU_FEATURE_USABLE_P (cpu_features, AVX2))
      34      return OPTIMIZE (fma);
      35  
      36    if (CPU_FEATURE_USABLE_P (cpu_features, FMA4))
      37      return OPTIMIZE (fma4);
      38  
      39    if (CPU_FEATURE_USABLE_P (cpu_features, AVX))
      40      return OPTIMIZE (avx);
      41  
      42    return OPTIMIZE (sse2);
      43  }