2012-02-29 Bruno Haible <bruno@clisp.org>
+ Tests for module 'hypotl'.
+ * modules/hypotl-tests: New file.
+ * tests/test-hypotl.c: New file.
+
New module 'hypotl'.
* lib/math.in.h (hypotl): New declaration.
* lib/hypotl.c: New file.
--- /dev/null
+/* Test of hypotl() function.
+ Copyright (C) 2010-2012 Free Software Foundation, Inc.
+
+ This program 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.
+
+ This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (hypotl, long double, (long double, long double));
+
+#include <float.h>
+
+#include "macros.h"
+
+volatile long double x;
+volatile long double y;
+long double z;
+
+int
+main ()
+{
+ /* A particular value. */
+ x = 0.4L;
+ y = 0.6L;
+ z = hypotl (x, y);
+ ASSERT (z >= 0.7211102550L && z <= 0.7211102551L);
+
+ /* Overflow. */
+ x = LDBL_MAX;
+ y = LDBL_MAX * 0.5L;
+ z = hypotl (x, y);
+ ASSERT (z == HUGE_VALL);
+
+ /* No underflow. */
+ x = LDBL_MIN;
+ y = 0.0L;
+ z = hypotl (x, y);
+ ASSERT (z == LDBL_MIN);
+
+ /* No underflow. */
+ x = LDBL_MIN * 2.0L;
+ y = LDBL_MIN * 3.0L;
+ z = hypotl (x, y);
+ ASSERT (z >= LDBL_MIN * 2.0L && z <= LDBL_MIN * 4.0L);
+
+ return 0;
+}