| /* FPU-related code for systems with GNU libc. |
| Copyright 2005, 2007 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 |
| } |