1 /*
   2  * Copyright (c) 2016, 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 package compiler.intrinsics.bmi;
  25 
  26 /*
  27  * Verify that the C2 implementations of lzcnt return correct
  28  * values.
  29  * This class is extended to provide Integer and Long implementation
  30  * tests.
  31  * @see VerifyLzcntI.java and VerifyLzcntL.java
  32  */
  33 abstract class VerifyLzcntBase<T extends Number>
  34 {
  35     protected static final int WARMUP_LOOPCOUNT = 10000000;
  36     protected static final int TEST_LOOPCOUNT = 100000000;
  37     
  38     protected long warmupLoopCount = WARMUP_LOOPCOUNT;
  39     protected long testLoopCount = TEST_LOOPCOUNT;
  40 
  41     protected int count = 0;
  42     protected int expCount = 0;
  43     
  44     protected static int expMax;
  45 
  46     protected T testValue;
  47 
  48     /**
  49      * Create a new instance of VerifyLzcnt
  50     **/
  51     protected VerifyLzcntBase()
  52     {
  53     }
  54 
  55     public void setTestLoopCount(long loopCount)
  56     {
  57         if (loopCount > 0) {
  58             this.testLoopCount = loopCount;
  59         }
  60     }
  61 
  62     protected void testFail()
  63     {
  64         System.err.println("FAIL: test-value: " + valueToHexString() +
  65             " expected: " + expCount + "; got: " + count);
  66     }
  67 
  68     protected abstract int getCount();
  69     protected abstract void initValue();
  70     protected abstract void nextValue();
  71     protected abstract String valueToHexString();
  72 
  73     public void runTest()
  74     {
  75         System.out.println("Test: " + toString());
  76 
  77         warmup();
  78         run();
  79     }
  80 
  81     protected void warmup()
  82     {
  83         System.out.println("Warmup: " + warmupLoopCount + " iterations");
  84 
  85         initValue();
  86 
  87         for (int i=0; i<warmupLoopCount; i++) {
  88             count = getCount();
  89                 
  90             nextValue();
  91         }
  92     }
  93 
  94     protected void run()
  95     {
  96         System.out.println("Run:    " + testLoopCount + " iterations");
  97 
  98         initValue();
  99         expCount = expMax;
 100 
 101         for (int i = 0; i < testLoopCount; i++) {
 102             count = getCount();
 103 
 104             if (count != expCount) {
 105                 testFail();
 106                 System.exit(97);
 107             }
 108 
 109             nextValue();
 110 
 111             if (--expCount == -1) {
 112                     expCount = expMax;
 113             }
 114         }
 115     }
 116 
 117     public String toString()
 118     {
 119         return getClass().getName();
 120     }
 121 }