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test/compiler/6855215/Test6855215.java@fb9d124d9192 (annotated)

test/compiler/6855215/Test6855215.java

Wed, 21 May 2014 10:56:41 -0700

author

katleman

date

Wed, 21 May 2014 10:56:41 -0700

changeset 6672

fb9d124d9192

parent 1907

c18cbe5936b8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Added tag jdk8u20-b15 for changeset 8c785f9bde6f

never@1388	1	/*
trims@1907	2	* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
never@1388	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1388	4	*
never@1388	5	* This code is free software; you can redistribute it and/or modify it
never@1388	6	* under the terms of the GNU General Public License version 2 only, as
never@1388	7	* published by the Free Software Foundation.
never@1388	8	*
never@1388	9	* This code is distributed in the hope that it will be useful, but WITHOUT
never@1388	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1388	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@1388	12	* version 2 for more details (a copy is included in the LICENSE file that
never@1388	13	* accompanied this code).
never@1388	14	*
never@1388	15	* You should have received a copy of the GNU General Public License version
never@1388	16	* 2 along with this work; if not, write to the Free Software Foundation,
never@1388	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1388	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
never@1388	22	*
never@1388	23	*/
never@1388	24
never@1388	25	/**
never@1388	26	* @test
never@1388	27	* @bug 6855215
never@1388	28	* @summary Calculation error (NaN) after about 1500 calculations
never@1388	29	*
never@1388	30	* @run main/othervm -Xbatch -XX:UseSSE=0 Test6855215
never@1388	31	*/
never@1388	32
never@1388	33	public class Test6855215 {
never@1388	34	private double m;
never@1388	35	private double b;
never@1388	36
never@1388	37	public static double log10(double x) {
never@1388	38	return Math.log(x) / Math.log(10);
never@1388	39	}
never@1388	40
never@1388	41	void calcMapping(double xmin, double xmax, double ymin, double ymax) {
never@1388	42	m = (ymax - ymin) / (log10(xmax) - log10(xmin));
never@1388	43	b = (log10(xmin) * ymax - log10(xmax) * ymin);
never@1388	44	}
never@1388	45
never@1388	46	public static void main(String[] args) {
never@1388	47	Test6855215 c = new Test6855215();
never@1388	48	for (int i = 0; i < 30000; i++) {
never@1388	49	c.calcMapping(91, 121, 177, 34);
never@1388	50	if (c.m != c.m) {
never@1388	51	throw new InternalError();
never@1388	52	}
never@1388	53	}
never@1388	54	}
never@1388	55	}