/*

 * Copyright (c) 2015, 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 8076373

 * @summary Verify if signaling NaNs are preserved.

 */

public class NaNTest {

    static void testFloat() {

        int originalValue = 0x7f800001;

        int readBackValue = Float.floatToRawIntBits(Float.intBitsToFloat(originalValue));

        if (originalValue != readBackValue) {

            String errorMessage = String.format("Original and read back float values mismatch\n0x%X 0x%X\n",

                                                originalValue,

                                                readBackValue);

            throw new RuntimeException(errorMessage);

        } else {

            System.out.printf("Written and read back float values match\n0x%X 0x%X\n",

                              originalValue,

                              readBackValue);

        }

    }

    static void testDouble() {

        long originalValue = 0xFFF0000000000001L;

        long readBackValue = Double.doubleToRawLongBits(Double.longBitsToDouble(originalValue));

        if (originalValue != readBackValue) {

            String errorMessage = String.format("Original and read back double values mismatch\n0x%X 0x%X\n",

                                                originalValue,

                                                readBackValue);

            throw new RuntimeException(errorMessage);

        } else {

            System.out.printf("Written and read back double values match\n0x%X 0x%X\n",

                              originalValue,

                              readBackValue);

        }

    }

    public static void main(String args[]) {

        System.out.println("### NanTest started");

        testFloat();

        testDouble();

        System.out.println("### NanTest ended");

    }

}