sysdeps/x86_64/tst-glibc-hwcaps.c

   1 /* glibc-hwcaps subdirectory test.  x86_64 version.
   2    Copyright (C) 2020-2023 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 <stdio.h>
  20 #include <support/check.h>
  21 #include <sys/param.h>
  22 #include <elf.h>
  23 #include <get-isa-level.h>
  24
  25 extern int marker2 (void);
  26 extern int marker3 (void);
  27 extern int marker4 (void);
  28
  29 /* Return the x86-64-vN level, 1 for the baseline.  */
  30 static int
  31 compute_level (void)
  32 {
  33   const struct cpu_features *cpu_features = __get_cpu_features ();
  34   unsigned int isa_level = get_isa_level (cpu_features);
  35
  36   if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V2))
  37     return 1;
  38   if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V3))
  39     return 2;
  40   if (!(isa_level & GNU_PROPERTY_X86_ISA_1_V4))
  41     return 3;
  42   return 4;
  43 }
  44
  45 static int
  46 do_test (void)
  47 {
  48   int level = compute_level ();
  49   printf ("info: detected x86-64 micro-architecture level: %d\n", level);
  50   TEST_COMPARE (marker2 (), MIN (level, 2));
  51   TEST_COMPARE (marker3 (), MIN (level, 3));
  52   TEST_COMPARE (marker4 (), MIN (level, 4));
  53   return 0;
  54 }
  55
  56 #include <support/test-driver.c>