Mercurial > hg > graal-jvmci-8
diff 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 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/6855215/Test6855215.java Mon Aug 31 17:07:53 2009 -0700 @@ -0,0 +1,55 @@ +/* + * Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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 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(); + } + } + } +}