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authorJing Yu <jingyu@google.com>2009-11-05 15:11:04 -0800
committerJing Yu <jingyu@google.com>2009-11-05 15:11:04 -0800
commitdf62c1c110e8532b995b23540b7e3695729c0779 (patch)
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Check in gcc sources for prebuilt toolchains in Eclair.
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+/* Implementation of the RRSPACING intrinsic
+ Copyright 2006 Free Software Foundation, Inc.
+ Contributed by Steven G. Kargl <kargl@gcc.gnu.org>
+
+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. */
+
+#include "config.h"
+#include <math.h>
+#include "libgfortran.h"
+
+
+#if defined (HAVE_GFC_REAL_8) && defined (HAVE_FABS) && defined (HAVE_FREXP)
+
+extern GFC_REAL_8 rrspacing_r8 (GFC_REAL_8 s, int p);
+export_proto(rrspacing_r8);
+
+GFC_REAL_8
+rrspacing_r8 (GFC_REAL_8 s, int p)
+{
+ int e;
+ GFC_REAL_8 x;
+ x = fabs (s);
+ if (x == 0.)
+ return 0.;
+ frexp (s, &e);
+#if defined (HAVE_LDEXP)
+ return ldexp (x, p - e);
+#else
+ return scalbn (x, p - e);
+#endif
+
+}
+
+#endif