1 /*
   2  * Copyright (c) 2012, 2012, 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 package org.graalvm.compiler.jtt.jdk;
  24 
  25 import org.junit.Test;
  26 
  27 import org.graalvm.compiler.jtt.JTTTest;
  28 
  29 public class IntegerBits extends JTTTest {
  30 
  31     @SuppressWarnings("unused") private static int init = Integer.reverseBytes(42);
  32     private static int original = 0x01020304;
  33     private static int v = 0b1000;
  34     private static int zero = 0;
  35 
  36     public static int test(int o) {
  37         return Integer.reverseBytes(o);
  38     }
  39 
  40     public static int test2(int o) {
  41         return Integer.numberOfLeadingZeros(o);
  42     }
  43 
  44     public static int test3(int o) {
  45         return Integer.numberOfTrailingZeros(o);
  46     }
  47 
  48     public static int test4(int o) {
  49         return Integer.bitCount(o);
  50     }
  51 
  52     @Test
  53     public void run0() {
  54         runTest("test", original);
  55     }
  56 
  57     @Test
  58     public void run1() {
  59         runTest("test3", v);
  60     }
  61 
  62     @Test
  63     public void run2() {
  64         runTest("test2", v);
  65     }
  66 
  67     @Test
  68     public void run3() {
  69         runTest("test3", zero);
  70     }
  71 
  72     @Test
  73     public void run4() {
  74         runTest("test2", zero);
  75     }
  76 
  77     @Test
  78     public void run5() {
  79         runTest("test", 0x01020304);
  80     }
  81 
  82     @Test
  83     public void run6() {
  84         runTest("test3", 0b1000);
  85     }
  86 
  87     @Test
  88     public void run7() {
  89         runTest("test2", 0b1000);
  90     }
  91 
  92     @Test
  93     public void run8() {
  94         runTest("test3", 0);
  95     }
  96 
  97     @Test
  98     public void run9() {
  99         runTest("test2", 0);
 100     }
 101 
 102     @Test
 103     public void run10() {
 104         runTest("test4", 0xffffffff);
 105     }
 106 
 107     @Test
 108     public void run11() {
 109         runTest("test2", 0xFFFFFFFF);
 110     }
 111 
 112     @Test
 113     public void run12() {
 114         runTest("test2", 0x7FFFFFFF);
 115     }
 116 
 117     @Test
 118     public void run17() {
 119         runTest("test2", 0x80000000);
 120     }
 121 
 122     @Test
 123     public void run18() {
 124         runTest("test2", 0x40000000);
 125     }
 126 
 127     @Test
 128     public void run13() {
 129         runTest("test3", 0x7FFFFFFF);
 130     }
 131 
 132     @Test
 133     public void run14() {
 134         runTest("test3", 0xFFFFFFFF);
 135     }
 136 
 137     @Test
 138     public void run15() {
 139         runTest("test3", 0x80000000);
 140     }
 141 
 142     @Test
 143     public void run16() {
 144         runTest("test3", 0x40000000);
 145     }
 146 
 147     @Test
 148     public void run19() {
 149         runTest("test4", 0x80000000);
 150     }
 151 
 152     @Test
 153     public void run20() {
 154         runTest("test4", 0x40000000);
 155     }
 156 
 157     @Test
 158     public void run21() {
 159         runTest("test4", 0x00000001);
 160     }
 161 
 162 }