sysdeps/x86/dl-isa-level.h

   1 /* Support for reading ISA level in /etc/ld.so.cache files written by
   2    Linux ldconfig.  x86 version.
   3    Copyright (C) 2021-2023 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 <sys/platform/x86.h>
  21
  22 /* Return true if the ISA level in ENTRY is compatible with CPU.  */
  23 static inline bool
  24 dl_cache_hwcap_isa_level_compatible (struct file_entry_new *entry)
  25 {
  26   const struct cpu_features *cpu_features = __get_cpu_features ();
  27   unsigned int isa_level
  28     = 1 << ((entry->hwcap >> 32) & DL_CACHE_HWCAP_ISA_LEVEL_MASK);
  29
  30   return (isa_level & cpu_features->isa_1) == isa_level;
  31 }