Mercurial > hg > truffle
comparison test/compiler/6855215/Test6855215.java @ 953:ff1a29907b6c
6855215: Calculation error (NaN) after about 1500 calculations
Reviewed-by: kvn
author | never |
---|---|
date | Mon, 31 Aug 2009 17:07:53 -0700 |
parents | |
children | c18cbe5936b8 |
comparison
equal
deleted
inserted
replaced
952:ace8397c8563 | 953:ff1a29907b6c |
---|---|
1 /* | |
2 * Copyright 2009 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 /** | |
26 * @test | |
27 * @bug 6855215 | |
28 * @summary Calculation error (NaN) after about 1500 calculations | |
29 * | |
30 * @run main/othervm -Xbatch -XX:UseSSE=0 Test6855215 | |
31 */ | |
32 | |
33 public class Test6855215 { | |
34 private double m; | |
35 private double b; | |
36 | |
37 public static double log10(double x) { | |
38 return Math.log(x) / Math.log(10); | |
39 } | |
40 | |
41 void calcMapping(double xmin, double xmax, double ymin, double ymax) { | |
42 m = (ymax - ymin) / (log10(xmax) - log10(xmin)); | |
43 b = (log10(xmin) * ymax - log10(xmax) * ymin); | |
44 } | |
45 | |
46 public static void main(String[] args) { | |
47 Test6855215 c = new Test6855215(); | |
48 for (int i = 0; i < 30000; i++) { | |
49 c.calcMapping(91, 121, 177, 34); | |
50 if (c.m != c.m) { | |
51 throw new InternalError(); | |
52 } | |
53 } | |
54 } | |
55 } |