math/test-fpucw.c

   1 /* Copyright (C) 2000-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <fpu_control.h>
  19 #include <stdio.h>
  20
  21 #ifndef FPU_CONTROL
  22 # define FPU_CONTROL _FPU_DEFAULT
  23 #endif
  24
  25 static int
  26 do_test (void)
  27 {
  28 #ifdef _FPU_GETCW
  29 /* Some architectures don't have _FPU_GETCW (e.g. Linux/Alpha).  */
  30   fpu_control_t cw;
  31
  32   _FPU_GETCW (cw);
  33
  34   cw &= ~_FPU_RESERVED;
  35
  36   if (cw != (FPU_CONTROL & ~_FPU_RESERVED))
  37     printf ("control word is 0x%lx but should be 0x%lx.\n",
  38             (long int) cw, (long int) (FPU_CONTROL & ~_FPU_RESERVED));
  39
  40   return cw != (FPU_CONTROL & ~_FPU_RESERVED);
  41
  42 #else
  43   return 0;
  44 #endif
  45 }
  46
  47 #define TEST_FUNCTION do_test ()
  48 #include "../test-skeleton.c"