sysdeps/x86_64/multiarch/test-multiarch.c

   1 /* Test CPU feature data.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 2012-2016 Free Software Foundation, Inc.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <init-arch.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 static char *cpu_flags;
  25
  26 /* Search for flags in /proc/cpuinfo and store line
  27    in cpu_flags.  */
  28 void
  29 get_cpuinfo (void)
  30 {
  31   FILE *f;
  32   char *line = NULL;
  33   size_t len = 0;
  34   ssize_t read;
  35
  36   f = fopen ("/proc/cpuinfo", "r");
  37   if (f == NULL)
  38     {
  39       printf ("cannot open /proc/cpuinfo\n");
  40       exit (1);
  41     }
  42
  43   while ((read = getline (&line, &len, f)) != -1)
  44     {
  45       if (strncmp (line, "flags", 5) == 0)
  46        {
  47          cpu_flags = strdup (line);
  48          break;
  49        }
  50     }
  51   fclose (f);
  52   free (line);
  53 }
  54
  55 int
  56 check_proc (const char *proc_name, int flag, const char *name)
  57 {
  58   int found = 0;
  59
  60   printf ("Checking %s:\n", name);
  61   printf ("  init-arch %d\n", flag);
  62   if (strstr (cpu_flags, proc_name) != NULL)
  63     found = 1;
  64   printf ("  cpuinfo (%s) %d\n", proc_name, found);
  65
  66   if (found != flag)
  67     printf (" *** failure ***\n");
  68
  69   return (found != flag);
  70 }
  71
  72 static int
  73 do_test (int argc, char **argv)
  74 {
  75   int fails;
  76
  77   get_cpuinfo ();
  78   fails = check_proc ("avx", HAS_ARCH_FEATURE (AVX_Usable),
  79                       "HAS_ARCH_FEATURE (AVX_Usable)");
  80   fails += check_proc ("fma4", HAS_ARCH_FEATURE (FMA4_Usable),
  81                        "HAS_ARCH_FEATURE (FMA4_Usable)");
  82   fails += check_proc ("sse4_2", HAS_CPU_FEATURE (SSE4_2),
  83                        "HAS_CPU_FEATURE (SSE4_2)");
  84   fails += check_proc ("sse4_1", HAS_CPU_FEATURE (SSE4_1)
  85                        , "HAS_CPU_FEATURE (SSE4_1)");
  86   fails += check_proc ("ssse3", HAS_CPU_FEATURE (SSSE3),
  87                        "HAS_CPU_FEATURE (SSSE3)");
  88   fails += check_proc ("popcnt", HAS_CPU_FEATURE (POPCOUNT),
  89                        "HAS_CPU_FEATURE (POPCOUNT)");
  90
  91   printf ("%d differences between /proc/cpuinfo and glibc code.\n", fails);
  92
  93   return (fails != 0);
  94 }
  95
  96 #include "../../../test-skeleton.c"