1 files changed, 87 insertions, 0 deletions
diff --git a/libgfortran/config/fpu-glibc.h b/libgfortran/config/fpu-glibc.h
new file mode 100644
index 000000000..807f0942e
--- /dev/null
+++ b/libgfortran/config/fpu-glibc.h
@@ -0,0 +1,87 @@
+/* FPU-related code for systems with GNU libc.
+   Copyright 2005, 2007, 2009 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 3 of the License, or (at your option) any later version.
+
+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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+/* 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
+}