/*

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 * 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,

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 *

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 */

/**

 * @test

 * @bug 6800154

 * @summary Add comments to long_by_long_mulhi() for better understandability

 * @modules java.base/jdk.internal.misc

 * @library /test/lib

 *

 * @run main/othervm -Xcomp

 *      -XX:CompileCommand=compileonly,compiler.c2.Test6800154::divcomp

 *      compiler.c2.Test6800154

 */

package compiler.c2;

import jdk.test.lib.Utils;

public class Test6800154 implements Runnable {

    static final long[] DIVIDENDS = {

        0,

        1,

        2,

        1423487,

        4444441,

        4918923241323L,

        -1,

        -24351,

        0x3333,

        0x0000000080000000L,

        0x7fffffffffffffffL,

        0x8000000000000000L

    };

    static final long[] DIVISORS = {

        1,

        2,

        17,

        12342,

        24123,

        143444,

        123444442344L,

        -1,

        -2,

        -4423423234231423L,

        0x0000000080000000L,

        0x7fffffffffffffffL,

        0x8000000000000000L

    };

    // Initialize DIVISOR so that it is final in this class.

    static final long DIVISOR;

    static {

        long value = 0;

        try {

            value = Long.decode(System.getProperty("divisor"));

        } catch (Throwable e) {

        }

        DIVISOR = value;

    }

    public static void main(String[] args) throws Exception

    {

        Class cl = Test6800154.class;

        ClassLoader apploader = cl.getClassLoader();

        // Iterate over all divisors.

        for (int i = 0; i < DIVISORS.length; i++) {

            System.setProperty("divisor", "" + DIVISORS[i]);

            ClassLoader loader

                    = Utils.getTestClassPathURLClassLoader(apploader.getParent());

            Class c = loader.loadClass(Test6800154.class.getName());

            Runnable r = (Runnable) c.newInstance();

            r.run();

        }

    }

    public void run()

    {

        // Iterate over all dividends.

        for (int i = 0; i < DIVIDENDS.length; i++) {

            long dividend = DIVIDENDS[i];

            long expected = divint(dividend);

            long result = divcomp(dividend);

            if (result != expected)

                throw new InternalError(dividend + " / " + DIVISOR + " failed: " + result + " != " + expected);

        }

    }

    static long divint(long a)  { return a / DIVISOR; }

    static long divcomp(long a) { return a / DIVISOR; }

}