1 /*
   2  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 6800154
  27  * @summary Add comments to long_by_long_mulhi() for better understandability
  28  *
  29  * @run main/othervm -Xcomp -XX:CompileOnly=Test6800154.divcomp Test6800154
  30  */
  31 
  32 import java.net.URLClassLoader;
  33 
  34 public class Test6800154 implements Runnable {
  35     static final long[] DIVIDENDS = {
  36         0,
  37         1,
  38         2,
  39         1423487,
  40         4444441,
  41         4918923241323L,
  42         -1,
  43         -24351,
  44         0x3333,
  45         0x0000000080000000L,
  46         0x7fffffffffffffffL,
  47         0x8000000000000000L
  48     };
  49 
  50     static final long[] DIVISORS = {
  51         1,
  52         2,
  53         17,
  54         12342,
  55         24123,
  56         143444,
  57         123444442344L,
  58         -1,
  59         -2,
  60         -4423423234231423L,
  61         0x0000000080000000L,
  62         0x7fffffffffffffffL,
  63         0x8000000000000000L
  64     };
  65 
  66     // Initialize DIVISOR so that it is final in this class.
  67     static final long DIVISOR;
  68 
  69     static {
  70         long value = 0;
  71         try {
  72             value = Long.decode(System.getProperty("divisor"));
  73         } catch (Throwable e) {
  74         }
  75         DIVISOR = value;
  76     }
  77 
  78     public static void main(String[] args) throws Exception
  79     {
  80         Class cl = Class.forName("Test6800154");
  81         URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
  82 
  83         // Iterate over all divisors.
  84         for (int i = 0; i < DIVISORS.length; i++) {
  85             System.setProperty("divisor", "" + DIVISORS[i]);
  86             ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
  87             Class c = loader.loadClass("Test6800154");
  88             Runnable r = (Runnable) c.newInstance();
  89             r.run();
  90         }
  91     }
  92 
  93     public void run()
  94     {
  95         // Iterate over all dividends.
  96         for (int i = 0; i < DIVIDENDS.length; i++) {
  97             long dividend = DIVIDENDS[i];
  98 
  99             long expected = divint(dividend);
 100             long result = divcomp(dividend);
 101 
 102             if (result != expected)
 103                 throw new InternalError(dividend + " / " + DIVISOR + " failed: " + result + " != " + expected);
 104         }
 105     }
 106 
 107     static long divint(long a)  { return a / DIVISOR; }
 108     static long divcomp(long a) { return a / DIVISOR; }
 109 }