aoqi@0: /*
aoqi@0:  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @test
aoqi@0:  * @bug 6800154
aoqi@0:  * @summary Add comments to long_by_long_mulhi() for better understandability
aoqi@0:  *
aoqi@0:  * @run main/othervm -Xcomp -XX:CompileOnly=Test6800154.divcomp Test6800154
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.net.URLClassLoader;
aoqi@0: 
aoqi@0: public class Test6800154 implements Runnable {
aoqi@0:     static final long[] DIVIDENDS = {
aoqi@0:         0,
aoqi@0:         1,
aoqi@0:         2,
aoqi@0:         1423487,
aoqi@0:         4444441,
aoqi@0:         4918923241323L,
aoqi@0:         -1,
aoqi@0:         -24351,
aoqi@0:         0x3333,
aoqi@0:         0x0000000080000000L,
aoqi@0:         0x7fffffffffffffffL,
aoqi@0:         0x8000000000000000L
aoqi@0:     };
aoqi@0: 
aoqi@0:     static final long[] DIVISORS = {
aoqi@0:         1,
aoqi@0:         2,
aoqi@0:         17,
aoqi@0:         12342,
aoqi@0:         24123,
aoqi@0:         143444,
aoqi@0:         123444442344L,
aoqi@0:         -1,
aoqi@0:         -2,
aoqi@0:         -4423423234231423L,
aoqi@0:         0x0000000080000000L,
aoqi@0:         0x7fffffffffffffffL,
aoqi@0:         0x8000000000000000L
aoqi@0:     };
aoqi@0: 
aoqi@0:     // Initialize DIVISOR so that it is final in this class.
aoqi@0:     static final long DIVISOR;
aoqi@0: 
aoqi@0:     static {
aoqi@0:         long value = 0;
aoqi@0:         try {
aoqi@0:             value = Long.decode(System.getProperty("divisor"));
aoqi@0:         } catch (Throwable e) {
aoqi@0:         }
aoqi@0:         DIVISOR = value;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void main(String[] args) throws Exception
aoqi@0:     {
aoqi@0:         Class cl = Class.forName("Test6800154");
aoqi@0:         URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
aoqi@0: 
aoqi@0:         // Iterate over all divisors.
aoqi@0:         for (int i = 0; i < DIVISORS.length; i++) {
aoqi@0:             System.setProperty("divisor", "" + DIVISORS[i]);
aoqi@0:             ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
aoqi@0:             Class c = loader.loadClass("Test6800154");
aoqi@0:             Runnable r = (Runnable) c.newInstance();
aoqi@0:             r.run();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void run()
aoqi@0:     {
aoqi@0:         // Iterate over all dividends.
aoqi@0:         for (int i = 0; i < DIVIDENDS.length; i++) {
aoqi@0:             long dividend = DIVIDENDS[i];
aoqi@0: 
aoqi@0:             long expected = divint(dividend);
aoqi@0:             long result = divcomp(dividend);
aoqi@0: 
aoqi@0:             if (result != expected)
aoqi@0:                 throw new InternalError(dividend + " / " + DIVISOR + " failed: " + result + " != " + expected);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static long divint(long a)  { return a / DIVISOR; }
aoqi@0:     static long divcomp(long a) { return a / DIVISOR; }
aoqi@0: }