math/test-fpucw.c

   1 /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Jaeger <aj@suse.de>, 2000.
   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 <fpu_control.h>
  20 #include <stdio.h>
  21
  22 #ifndef FPU_CONTROL
  23 # define FPU_CONTROL _FPU_DEFAULT
  24 #endif
  25
  26 int
  27 main (void)
  28 {
  29 #ifdef _FPU_GETCW
  30 /* Some architectures don't have _FPU_GETCW (e.g. Linux/Alpha).  */
  31   fpu_control_t cw;
  32
  33   _FPU_GETCW (cw);
  34
  35   cw &= ~_FPU_RESERVED;
  36
  37   if (cw != (FPU_CONTROL & ~_FPU_RESERVED))
  38     printf ("control word is 0x%lx but should be 0x%lx.\n",
  39             (long int) cw, (long int) (FPU_CONTROL & ~_FPU_RESERVED));
  40
  41   return cw != (FPU_CONTROL & ~_FPU_RESERVED);
  42
  43 #else
  44   return 0;
  45 #endif
  46 }