aoqi@0: /* aoqi@0: * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: * aoqi@0: */ aoqi@0: aoqi@0: /** aoqi@0: * @test aoqi@0: * @bug 6855215 aoqi@0: * @summary Calculation error (NaN) after about 1500 calculations aoqi@0: * aoqi@0: * @run main/othervm -Xbatch -XX:UseSSE=0 Test6855215 aoqi@0: */ aoqi@0: aoqi@0: public class Test6855215 { aoqi@0: private double m; aoqi@0: private double b; aoqi@0: aoqi@0: public static double log10(double x) { aoqi@0: return Math.log(x) / Math.log(10); aoqi@0: } aoqi@0: aoqi@0: void calcMapping(double xmin, double xmax, double ymin, double ymax) { aoqi@0: m = (ymax - ymin) / (log10(xmax) - log10(xmin)); aoqi@0: b = (log10(xmin) * ymax - log10(xmax) * ymin); aoqi@0: } aoqi@0: aoqi@0: public static void main(String[] args) { aoqi@0: Test6855215 c = new Test6855215(); aoqi@0: for (int i = 0; i < 30000; i++) { aoqi@0: c.calcMapping(91, 121, 177, 34); aoqi@0: if (c.m != c.m) { aoqi@0: throw new InternalError(); aoqi@0: } aoqi@0: } aoqi@0: } aoqi@0: }