sysdeps/i386/i686/multiarch/ifunc-sse2-ssse3.h

   1 /* Common definition for ifunc selections optimized with SSE2 and
   2    SSSE3.
   3    All versions must be listed in ifunc-impl-list.c.
   4    Copyright (C) 2017-2024 Free Software Foundation, Inc.
   5    This file is part of the GNU C Library.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #include <init-arch.h>
  22
  23 extern __typeof (REDIRECT_NAME) OPTIMIZE (ia32) attribute_hidden;
  24 extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
  25 extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) 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, SSE2)
  33       && CPU_FEATURES_ARCH_P (cpu_features, Fast_Rep_String))
  34     return OPTIMIZE (sse2);
  35
  36   if (CPU_FEATURE_USABLE_P (cpu_features, SSSE3))
  37     return OPTIMIZE (ssse3);
  38
  39   return OPTIMIZE (ia32);
  40 }