1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  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
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  23 
  24 /**
  25  * @test
  26  * @bug 6800154
  27  * @summary Add comments to long_by_long_mulhi() for better understandability
  28  * @modules java.base/jdk.internal.misc
  29  * @library /testlibrary
  30  *
  31  * @run main/othervm -Xcomp
  32  *      -XX:CompileCommand=compileonly,compiler.c2.Test6800154::divcomp
  33  *      compiler.c2.Test6800154
  34  */
  35 
  36 
  37 package compiler.c2;
  38 
  39 import jdk.test.lib.Utils;
  40 
  41 public class Test6800154 implements Runnable {
  42     static final long[] DIVIDENDS = {
  43         0,
  44         1,
  45         2,
  46         1423487,
  47         4444441,
  48         4918923241323L,
  49         -1,
  50         -24351,
  51         0x3333,
  52         0x0000000080000000L,
  53         0x7fffffffffffffffL,
  54         0x8000000000000000L
  55     };
  56 
  57     static final long[] DIVISORS = {
  58         1,
  59         2,
  60         17,
  61         12342,
  62         24123,
  63         143444,
  64         123444442344L,
  65         -1,
  66         -2,
  67         -4423423234231423L,
  68         0x0000000080000000L,
  69         0x7fffffffffffffffL,
  70         0x8000000000000000L
  71     };
  72 
  73     // Initialize DIVISOR so that it is final in this class.
  74     static final long DIVISOR;
  75 
  76     static {
  77         long value = 0;
  78         try {
  79             value = Long.decode(System.getProperty("divisor"));
  80         } catch (Throwable e) {
  81         }
  82         DIVISOR = value;
  83     }
  84 
  85     public static void main(String[] args) throws Exception
  86     {
  87         Class cl = Test6800154.class;
  88         ClassLoader apploader = cl.getClassLoader();
  89 
  90         // Iterate over all divisors.
  91         for (int i = 0; i < DIVISORS.length; i++) {
  92             System.setProperty("divisor", "" + DIVISORS[i]);
  93             ClassLoader loader
  94                     = Utils.getTestClassPathURLClassLoader(apploader.getParent());
  95             Class c = loader.loadClass(Test6800154.class.getName());
  96             Runnable r = (Runnable) c.newInstance();
  97             r.run();
  98         }
  99     }
 100 
 101     public void run()
 102     {
 103         // Iterate over all dividends.
 104         for (int i = 0; i < DIVIDENDS.length; i++) {
 105             long dividend = DIVIDENDS[i];
 106 
 107             long expected = divint(dividend);
 108             long result = divcomp(dividend);
 109 
 110             if (result != expected)
 111                 throw new InternalError(dividend + " / " + DIVISOR + " failed: " + result + " != " + expected);
 112         }
 113     }
 114 
 115     static long divint(long a)  { return a / DIVISOR; }
 116     static long divcomp(long a) { return a / DIVISOR; }
 117 }