sysdeps/powerpc/test-gettimebase.c

   1 /* Check __ppc_get_timebase() for architecture changes
   2    Copyright (C) 2012-2018 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    <http://www.gnu.org/licenses/>.  */
  18
  19 /* Test if __ppc_get_timebase() is compatible with the current processor and if
  20    it's changing between reads.  A read failure might indicate a Power ISA or
  21    binutils change.  */
  22
  23 #include <inttypes.h>
  24 #include <stdio.h>
  25 #include <stdint.h>
  26
  27 #include <sys/platform/ppc.h>
  28
  29 static int
  30 do_test (void)
  31 {
  32   uint64_t t1, t2, t3;
  33   t1 = __ppc_get_timebase ();
  34   printf ("Time Base = %"PRIu64"\n", t1);
  35   t2 = __ppc_get_timebase ();
  36   printf ("Time Base = %"PRIu64"\n", t2);
  37   t3 = __ppc_get_timebase ();
  38   printf ("Time Base = %"PRIu64"\n", t3);
  39   if (t1 != t2 && t1 != t3 && t2 != t3)
  40     return 0;
  41
  42   printf ("Fail: timebase reads should always be different.\n");
  43   return 1;
  44 }
  45
  46 #include <support/test-driver.c>