Imported gcc-4.4.3

[msp430-gcc.git] / gmp / errno.c

diff --git a/gmp/errno.c b/gmp/errno.c
new file mode 100644 (file)
index 0000000..e5e160d
--- /dev/null
+++ b/gmp/errno.c
@@ -0,0 +1,59 @@
+/* gmp_errno, __gmp_exception -- exception handling and reporting.
+
+   THE FUNCTIONS IN THIS FILE, APART FROM gmp_errno, ARE FOR INTERNAL USE
+   ONLY.  THEY'RE ALMOST CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR
+   DISAPPEAR COMPLETELY IN FUTURE GNU MP RELEASES.
+
+Copyright 2000, 2001, 2003 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 3 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include <stdlib.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+
+int gmp_errno = 0;
+
+
+/* The deliberate divide by zero triggers an exception on most systems.  On
+   those where it doesn't, for example power and powerpc, use abort instead.
+
+   Enhancement: Perhaps raise(SIGFPE) (or the same with kill()) would be
+   better than abort.  Perhaps it'd be possible to get the BSD style
+   FPE_INTDIV_TRAP parameter in there too.  */
+
+void
+__gmp_exception (int error_bit)
+{
+  gmp_errno |= error_bit;
+  __gmp_junk = 10 / __gmp_0;
+  abort ();
+}
+
+
+/* These functions minimize the amount of code required in functions raising
+   exceptions.  Since they're "noreturn" and don't take any parameters, a
+   test and call might even come out as a simple conditional jump.  */
+void
+__gmp_sqrt_of_negative (void)
+{
+  __gmp_exception (GMP_ERROR_SQRT_OF_NEGATIVE);
+}
+void
+__gmp_divide_by_zero (void)
+{
+  __gmp_exception (GMP_ERROR_DIVISION_BY_ZERO);
+}