Test6855215.java revision 11707:ad7af1afda7a
1169695Skan/*
2169695Skan * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
3169695Skan * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4169695Skan *
5169695Skan * This code is free software; you can redistribute it and/or modify it
6169695Skan * under the terms of the GNU General Public License version 2 only, as
7169695Skan * published by the Free Software Foundation.
8169695Skan *
9169695Skan * This code is distributed in the hope that it will be useful, but WITHOUT
10169695Skan * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11169695Skan * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12169695Skan * version 2 for more details (a copy is included in the LICENSE file that
13169695Skan * accompanied this code).
14169695Skan *
15169695Skan * You should have received a copy of the GNU General Public License version
16169695Skan * 2 along with this work; if not, write to the Free Software Foundation,
17169695Skan * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18169695Skan *
19169695Skan * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20169695Skan * or visit www.oracle.com if you need additional information or have any
21169695Skan * questions.
22169695Skan *
23169695Skan */
24169695Skan
25169695Skan/**
26169695Skan * @test
27169695Skan * @bug 6855215
28169695Skan * @summary Calculation error (NaN) after about 1500 calculations
29169695Skan *
30169695Skan * @run main/othervm -Xbatch -XX:UseSSE=0 compiler.c1.Test6855215
31169695Skan */
32169695Skan
33169695Skanpackage compiler.c1;
34169695Skan
35169695Skanpublic class Test6855215 {
36169695Skan    private double m;
37169695Skan    private double b;
38169695Skan
39169695Skan    public static double log10(double x) {
40169695Skan        return Math.log(x) / Math.log(10);
41169695Skan    }
42169695Skan
43169695Skan    void calcMapping(double xmin, double xmax, double ymin, double ymax) {
44169695Skan        m = (ymax - ymin) / (log10(xmax) - log10(xmin));
45169695Skan        b = (log10(xmin) * ymax - log10(xmax) * ymin);
46169695Skan    }
47169695Skan
48169695Skan    public static void main(String[] args) {
49169695Skan        Test6855215 c = new Test6855215();
50169695Skan        for (int i = 0; i < 30000; i++) {
51169695Skan            c.calcMapping(91, 121, 177, 34);
52169695Skan            if (c.m != c.m) {
53169695Skan                throw new InternalError();
54169695Skan            }
55169695Skan        }
56169695Skan    }
57169695Skan}
58169695Skan