math/test-fexcept-traps.c

   1 /* Test fegetexceptflag and fesetexceptflag: exception traps enabled.
   2    Copyright (C) 2016-2021 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 <fenv.h>
  20 #include <stdio.h>
  21 #include <math-tests.h>
  22
  23 static int
  24 do_test (void)
  25 {
  26   int result = 0;
  27
  28   fedisableexcept (FE_ALL_EXCEPT);
  29   int ret = feraiseexcept (FE_ALL_EXCEPT);
  30   if (ret != 0)
  31     {
  32       if (EXCEPTION_TESTS (float))
  33         {
  34           puts ("feraiseexcept (FE_ALL_EXCEPT) failed");
  35           result = 1;
  36           return result;
  37         }
  38       else
  39         {
  40           puts ("feraiseexcept (FE_ALL_EXCEPT) unsupported, cannot test");
  41           return 77;
  42         }
  43     }
  44   fexcept_t saved;
  45   ret = fegetexceptflag (&saved, FE_ALL_EXCEPT);
  46   if (ret != 0)
  47     {
  48       puts ("fegetexceptflag failed");
  49       result = 1;
  50       return result;
  51     }
  52   feclearexcept (FE_ALL_EXCEPT);
  53
  54   ret = feenableexcept (FE_ALL_EXCEPT);
  55   if (!EXCEPTION_ENABLE_SUPPORTED (FE_ALL_EXCEPT) && (ret == -1))
  56     {
  57       puts ("feenableexcept (FE_ALL_EXCEPT) not supported, cannot test");
  58       return 77;
  59     }
  60   else if (ret != 0)
  61     {
  62       puts ("feenableexcept (FE_ALL_EXCEPT) failed");
  63       result = 1;
  64     }
  65
  66   if (EXCEPTION_SET_FORCES_TRAP)
  67     {
  68       puts ("setting exceptions traps, cannot test on this architecture");
  69       return 77;
  70     }
  71   /* The test is that this does not cause exception traps.  */
  72   ret = fesetexceptflag (&saved, FE_ALL_EXCEPT);
  73   if (ret != 0)
  74     {
  75       puts ("fesetexceptflag failed");
  76       result = 1;
  77     }
  78   feclearexcept (FE_ALL_EXCEPT);
  79
  80   return result;
  81 }
  82
  83 #define TEST_FUNCTION do_test ()
  84 #include "../test-skeleton.c"