sysdeps/powerpc/cpu-features.c

   1 /* Initialize cpu feature data.  PowerPC version.
   2    Copyright (C) 2017-2023 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 #include <stdint.h>
  20 #include <cpu-features.h>
  21
  22 #if HAVE_TUNABLES
  23 # include <elf/dl-tunables.h>
  24 #endif
  25
  26 static inline void
  27 init_cpu_features (struct cpu_features *cpu_features)
  28 {
  29   /* Default is to use aligned memory access on optimized function unless
  30      tunables is enable, since for this case user can explicit disable
  31      unaligned optimizations.  */
  32 #if HAVE_TUNABLES
  33   int32_t cached_memfunc = TUNABLE_GET (glibc, cpu, cached_memopt, int32_t,
  34                                         NULL);
  35   cpu_features->use_cached_memopt = (cached_memfunc > 0);
  36 #else
  37   cpu_features->use_cached_memopt = false;
  38 #endif
  39 }