| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 6855215 |
| * @summary Calculation error (NaN) after about 1500 calculations |
| * |
| * @run main/othervm -Xbatch -XX:UseSSE=0 compiler.c1.Test6855215 |
| */ |
| |
| package compiler.c1; |
| |
| 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(); |
| } |
| } |
| } |
| } |