* acinclude.m4 (LIBGFOR_CHECK_FPSETMASK): New check.

	* configure.ac: Check for floatingpoint.h, fptrap.h and float.h
	headers. Use LIBGFOR_CHECK_FPSETMASK. Check for fp_trap and
	fp_enable functions.
	* configure.host: Add case for systems with fpsetmask and systems
	with fp_trap/fp_enable.
	* config/fpu-sysv.h: New file, FPU code using fpsetmask.
	* config/fpu-aix.h: New file, FPU code for AIX using fp_trap and
	fp_enable.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* config.h.in: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@105956 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 91 insertions, 0 deletions

diff --git a/libgfortran/config/fpu-sysv.h b/libgfortran/config/fpu-sysv.h
new file mode 100644
index 00000000000..c2f28c4d17b
--- /dev/null
+++ b/libgfortran/config/fpu-sysv.h
@@ -0,0 +1,91 @@
+/* SysV FPU-related code (for systems not otherwise supported).
+   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 SysV platforms with fpsetmask().  */
+#ifdef HAVE_IEEEFP_H
+#include <ieeefp.h>
+#endif
+
+void
+set_fpu (void)
+{
+  int cw = 0;
+
+  if (options.fpe & GFC_FPE_INVALID)
+#ifdef FP_X_INV
+    cw |= FP_X_INV;
+#else
+    st_printf ("Fortran runtime warning: IEEE 'invalid operation' "
+	       "exception not supported.\n");
+#endif
+
+  if (options.fpe & GFC_FPE_DENORMAL)
+#ifdef FP_X_DNML
+    cw |= FP_X_DNML;
+#else
+    st_printf ("Fortran runtime warning: IEEE 'denormal number' "
+	       "exception not supported.\n");
+#endif
+
+  if (options.fpe & GFC_FPE_ZERO)
+#ifdef FP_X_DZ
+    cw |= FP_X_DZ;
+#else
+    st_printf ("Fortran runtime warning: IEEE 'division by zero' "
+	       "exception not supported.\n");
+#endif
+
+  if (options.fpe & GFC_FPE_OVERFLOW)
+#ifdef FP_X_OFL
+    cw |= FP_X_OFL;
+#else
+    st_printf ("Fortran runtime warning: IEEE 'overflow' "
+	       "exception not supported.\n");
+#endif
+
+  if (options.fpe & GFC_FPE_UNDERFLOW)
+#ifdef FP_X_UFL
+    cw |= FP_X_UFL;
+#else
+    st_printf ("Fortran runtime warning: IEEE 'underflow' "
+	       "exception not supported.\n");
+#endif
+
+  if (options.fpe & GFC_FPE_PRECISION)
+#ifdef FP_X_IMP
+    cw |= FP_X_IMP;
+#else
+    st_printf ("Fortran runtime warning: IEEE 'loss of precision' "
+	       "exception not supported.\n");
+#endif
+
+  fpsetmask(cw);
+}