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/* FPU-related code for systems with GNU libc.

   Copyright 2005 Free Software Foundation, Inc.

   Contributed by Francois-Xavier Coudert <coudert@clipper.ens.fr>

This file is part of the GNU Fortran 95 runtime library (libgfortran).

Libgfortran is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public

License as published by the Free Software Foundation; either

version 2 of the License, or (at your option) any later version.

In addition to the permissions in the GNU General Public License, the

Free Software Foundation gives you unlimited permission to link the

compiled version of this file into combinations with other programs,

and to distribute those combinations without any restriction coming

from the use of this file.  (The General Public License restrictions

do apply in other respects; for example, they cover modification of

the file, and distribution when not linked into a combine

executable.)

Libgfortran 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 General Public License for more details.

You should have received a copy of the GNU General Public

License along with libgfortran; see the file COPYING.  If not,

write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

Boston, MA 02110-1301, USA.  */

/* FPU-related code for systems with the GNU libc, providing the

   feenableexcept function in fenv.h to set individual exceptions

   (there's nothing to do that in C99).  */

#ifdef HAVE_FENV_H

#include <fenv.h>

#endif

void set_fpu (void)

{

  if (FE_ALL_EXCEPT != 0)

    fedisableexcept (FE_ALL_EXCEPT);

  if (options.fpe & GFC_FPE_INVALID)

#ifdef FE_INVALID

    feenableexcept (FE_INVALID);

#else

    st_printf ("Fortran runtime warning: IEEE 'invalid operation' "

               "exception not supported.\n");

#endif

/* glibc does never have a FE_DENORMAL.  */

  if (options.fpe & GFC_FPE_DENORMAL)

#ifdef FE_DENORMAL

    feenableexcept (FE_DENORMAL);

#else

    st_printf ("Fortran runtime warning: IEEE 'denormal number' "

               "exception not supported.\n");

#endif

  if (options.fpe & GFC_FPE_ZERO)

#ifdef FE_DIVBYZERO

    feenableexcept (FE_DIVBYZERO);

#else

    st_printf ("Fortran runtime warning: IEEE 'division by zero' "

               "exception not supported.\n");

#endif

  if (options.fpe & GFC_FPE_OVERFLOW)

#ifdef FE_OVERFLOW

    feenableexcept (FE_OVERFLOW);

#else

    st_printf ("Fortran runtime warning: IEEE 'overflow' "

               "exception not supported.\n");

#endif

  if (options.fpe & GFC_FPE_UNDERFLOW)

#ifdef FE_UNDERFLOW

    feenableexcept (FE_UNDERFLOW);

#else

    st_printf ("Fortran runtime warning: IEEE 'underflow' "

               "exception not supported.\n");

#endif

  if (options.fpe & GFC_FPE_PRECISION)

#ifdef FE_INEXACT

    feenableexcept (FE_INEXACT);

#else

    st_printf ("Fortran runtime warning: IEEE 'loss of precision' "

               "exception not supported.\n");

#endif

}