modules/cldc-compact/src/test/java/lang/TestTrailingZeros.java

   1 // -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
   2 // ---------------------------------------------------------------------------
   3 // SquirrelJME
   4 //     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
   5 // ---------------------------------------------------------------------------
   6 // SquirrelJME is under the GNU General Public License v3+, or later.
   7 // See license.mkd for licensing and copyright information.
   8 // ---------------------------------------------------------------------------
   9
  10 package lang;
  11
  12 import net.multiphasicapps.tac.TestSupplier;
  13
  14 /**
  15  * Tests trailing zero count.
  16  *
  17  * @since 2018/11/11
  18  */
  19 public class TestTrailingZeros
  20         extends TestSupplier<Integer>
  21 {
  22         /**
  23          * {@inheritDoc}
  24          * @since 2018/11/11
  25          */
  26         @Override
  27         public Integer test()
  28         {
  29                 int rv = Integer.numberOfTrailingZeros(0);
  30                 this.secondary("zero", rv);
  31
  32                 for (int i = 0; i < 31; i++)
  33                 {
  34                         int v = Integer.numberOfTrailingZeros(1 << i);
  35
  36                         this.secondary("b" + i, v);
  37
  38                         rv += v;
  39                 }
  40
  41                 for (int i = 0; i < 31; i++)
  42                 {
  43                         int v = Integer.numberOfTrailingZeros(0xDEADBEEF << i);
  44
  45                         this.secondary("d" + i, v);
  46
  47                         rv += v;
  48                 }
  49
  50                 return rv;
  51         }
  52 }
  53