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

 *

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 * 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).

 *

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

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/**

 * @test

 * @bug 4755500

 * @summary calling Math.round(NaN) can break subsequent calls to Math.round()

 * @run main compiler.floatingpoint.TestRound

 */

package compiler.floatingpoint;

public class TestRound {

    public static void main(String[] args) {

        // Note: it's really only necessary to run this loop 8 times to

        // reproduce the bug, but the 10000-length loop causes compilation

        // of Math.round() without any other command-line flags.

        // A bug in the d2l NaN case was causing overflow of the FPU

        // stack, yielding subsequent wrong results for flds.

        for (int i = 0; i < 10_000; i++) {

            Math.round(Double.NaN);

        }

        if (Math.round(1d) != 1) {

            throw new AssertionError("TEST FAILED");

        }

        System.out.println("Test passed.");

    }

}