* src-release (GDB_SUPPORT_DIRS): Add libdecnumber.

* libdecnumber: New directory, imported from GCC.

libdecnumber/decRound.h

@@ -0,0 +1,37 @@
+/* Internal testing support for rounding for decimal float.
+
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC 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, 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.)
+
+   GCC 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 GCC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include "decContext.h"
+
+#define DFP_INIT_ROUNDMODE(A)  A = __decGetRound()
+
+extern void __dfp_set_round (int);
+extern int __dfp_get_round (void);
+extern enum rounding __decGetRound (void);