1 /*
   2  * Copyright (c) 2009, 2015, 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  * @library /testlibrary
  29  * @run main/othervm -Xcomp -XX:CompileOnly=Test6800154.divcomp Test6800154
  30  */
  31 
  32 import java.io.File;
  33 import java.net.URL;
  34 import java.net.URLClassLoader;
  35 import jdk.test.lib.Utils;
  36 
  37 public class Test6800154 implements Runnable {
  38     static final long[] DIVIDENDS = {
  39         0,
  40         1,
  41         2,
  42         1423487,
  43         4444441,
  44         4918923241323L,
  45         -1,
  46         -24351,
  47         0x3333,
  48         0x0000000080000000L,
  49         0x7fffffffffffffffL,
  50         0x8000000000000000L
  51     };
  52 
  53     static final long[] DIVISORS = {
  54         1,
  55         2,
  56         17,
  57         12342,
  58         24123,
  59         143444,
  60         123444442344L,
  61         -1,
  62         -2,
  63         -4423423234231423L,
  64         0x0000000080000000L,
  65         0x7fffffffffffffffL,
  66         0x8000000000000000L
  67     };
  68 
  69     // Initialize DIVISOR so that it is final in this class.
  70     static final long DIVISOR;
  71 
  72     static {
  73         long value = 0;
  74         try {
  75             value = Long.decode(System.getProperty("divisor"));
  76         } catch (Throwable e) {
  77         }
  78         DIVISOR = value;
  79     }
  80 
  81     public static void main(String[] args) throws Exception
  82     {
  83         Class cl = Class.forName("Test6800154");
  84         ClassLoader apploader = cl.getClassLoader();
  85 
  86         // Iterate over all divisors.
  87         for (int i = 0; i < DIVISORS.length; i++) {
  88             System.setProperty("divisor", "" + DIVISORS[i]);
  89             ClassLoader loader
  90                     = Utils.getTestClassPathURLClassLoader(apploader.getParent());
  91             Class c = loader.loadClass("Test6800154");
  92             Runnable r = (Runnable) c.newInstance();
  93             r.run();
  94         }
  95     }
  96 
  97     public void run()
  98     {
  99         // Iterate over all dividends.
 100         for (int i = 0; i < DIVIDENDS.length; i++) {
 101             long dividend = DIVIDENDS[i];
 102 
 103             long expected = divint(dividend);
 104             long result = divcomp(dividend);
 105 
 106             if (result != expected)
 107                 throw new InternalError(dividend + " / " + DIVISOR + " failed: " + result + " != " + expected);
 108         }
 109     }
 110 
 111     static long divint(long a)  { return a / DIVISOR; }
 112     static long divcomp(long a) { return a / DIVISOR; }
 113 }