[01/12] Add fesetexcept

[Paul E. Murphy]

On 08/11/2016 03:57 PM, Joseph Myers wrote:
> +++ b/math/test-fesetexcept-traps.c
> @@ -0,0 +1,68 @@
> +/* Test fesetexcept: exception traps enabled.
> +   Copyright (C) 2016 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <fenv.h>
> +#include <stdio.h>
> +#include <math-tests.h>
> +
> +static int
> +do_test (void)
> +{
> +  int result = 0;
> +
> +  fedisableexcept (FE_ALL_EXCEPT);
> +  int ret = feenableexcept (FE_ALL_EXCEPT);
> +  if (!EXCEPTION_ENABLE_SUPPORTED (FE_ALL_EXCEPT) && (ret == -1))
> +    {
> +      puts ("feenableexcept (FE_ALL_EXCEPT) not supported, cannot test");
> +      return 77;
> +    }
> +  else if (ret != 0)
> +    {
> +      puts ("feenableexcept (FE_ALL_EXCEPT) failed");
> +      result = 1;
> +      return result;
> +    }
> +
> +  if (EXCEPTION_SET_FORCES_TRAP)
> +    {
> +      puts ("setting exceptions traps, cannot test on this architecture");
> +      return 77;
> +    }
> +  /* The test is that this does not cause exception traps.  */

This is the test description.  It would improve readability by reworking
it into the file description at the top.