/*

 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/**

 * @test

 * @bug 6855215

 * @summary Calculation error (NaN) after about 1500 calculations

 *

 * @run main/othervm -Xbatch -XX:UseSSE=0 Test6855215

 */

public class Test6855215 {

    private double m;

    private double b;

    public static double log10(double x) {

        return Math.log(x) / Math.log(10);

    }

    void calcMapping(double xmin, double xmax, double ymin, double ymax) {

        m = (ymax - ymin) / (log10(xmax) - log10(xmin));

        b = (log10(xmin) * ymax - log10(xmax) * ymin);

    }

    public static void main(String[] args) {

        Test6855215 c = new Test6855215();

        for (int i = 0; i < 30000; i++) {

            c.calcMapping(91, 121, 177, 34);

            if (c.m != c.m) {

                throw new InternalError();

            }

        }

    }

}