1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 /** 18 * Test comparison operators. 19 */ 20 public class Compare { 21 22 /* 23 * Test the integer comparisons in various ways. 24 */ 25 static void testIntCompare(int minus, int plus, int plus2, int zero) { 26 System.out.println("IntMath.testIntCompare"); 27 28 if (minus > plus) 29 Main.assertTrue(false); 30 if (minus >= plus) 31 Main.assertTrue(false); 32 if (plus < minus) 33 Main.assertTrue(false); 34 if (plus <= minus) 35 Main.assertTrue(false); 36 if (plus == minus) 37 Main.assertTrue(false); 38 if (plus != plus2) 39 Main.assertTrue(false); 40 41 /* try a branch-taken */ 42 if (plus != minus) { 43 Main.assertTrue(true); 44 } else { 45 Main.assertTrue(false); 46 } 47 48 if (minus > 0) 49 Main.assertTrue(false); 50 if (minus >= 0) 51 Main.assertTrue(false); 52 if (plus < 0) 53 Main.assertTrue(false); 54 if (plus <= 0) 55 Main.assertTrue(false); 56 if (plus == 0) 57 Main.assertTrue(false); 58 if (zero != 0) 59 Main.assertTrue(false); 60 61 if (zero == 0) { 62 Main.assertTrue(true); 63 } else { 64 Main.assertTrue(false); 65 } 66 } 67 68 /* 69 * Test cmp-long. 70 * 71 * minus=-5, alsoMinus=0xFFFFFFFF00000009, plus=4, alsoPlus=8 72 */ 73 static void testLongCompare(long minus, long alsoMinus, long plus, 74 long alsoPlus) { 75 76 System.out.println("IntMath.testLongCompare"); 77 if (minus > plus) 78 Main.assertTrue(false); 79 if (plus < minus) 80 Main.assertTrue(false); 81 if (plus == minus) 82 Main.assertTrue(false); 83 84 if (plus >= plus+1) 85 Main.assertTrue(false); 86 if (minus >= minus+1) 87 Main.assertTrue(false); 88 89 /* try a branch-taken */ 90 if (plus != minus) { 91 Main.assertTrue(true); 92 } else { 93 Main.assertTrue(false); 94 } 95 96 /* compare when high words are equal but low words differ */ 97 if (plus > alsoPlus) 98 Main.assertTrue(false); 99 if (alsoPlus < plus) 100 Main.assertTrue(false); 101 if (alsoPlus == plus) 102 Main.assertTrue(false); 103 104 /* high words are equal, low words have apparently different signs */ 105 if (minus < alsoMinus) // bug! 106 Main.assertTrue(false); 107 if (alsoMinus > minus) 108 Main.assertTrue(false); 109 if (alsoMinus == minus) 110 Main.assertTrue(false); 111 } 112 113 /* 114 * Test cmpl-float and cmpg-float. 115 */ 116 static void testFloatCompare(float minus, float plus, float plus2, 117 float nan) { 118 119 System.out.println("IntMath.testFloatCompare"); 120 if (minus > plus) 121 Main.assertTrue(false); 122 if (plus < minus) 123 Main.assertTrue(false); 124 if (plus == minus) 125 Main.assertTrue(false); 126 if (plus != plus2) 127 Main.assertTrue(false); 128 129 if (plus <= nan) 130 Main.assertTrue(false); 131 if (plus >= nan) 132 Main.assertTrue(false); 133 if (minus <= nan) 134 Main.assertTrue(false); 135 if (minus >= nan) 136 Main.assertTrue(false); 137 if (nan >= plus) 138 Main.assertTrue(false); 139 if (nan <= plus) 140 Main.assertTrue(false); 141 142 if (nan == nan) 143 Main.assertTrue(false); 144 } 145 146 static void testDoubleCompare(double minus, double plus, double plus2, 147 double nan) { 148 149 System.out.println("IntMath.testDoubleCompare"); 150 if (minus > plus) 151 Main.assertTrue(false); 152 if (plus < minus) 153 Main.assertTrue(false); 154 if (plus == minus) 155 Main.assertTrue(false); 156 if (plus != plus2) 157 Main.assertTrue(false); 158 159 if (plus <= nan) 160 Main.assertTrue(false); 161 if (plus >= nan) 162 Main.assertTrue(false); 163 if (minus <= nan) 164 Main.assertTrue(false); 165 if (minus >= nan) 166 Main.assertTrue(false); 167 if (nan >= plus) 168 Main.assertTrue(false); 169 if (nan <= plus) 170 Main.assertTrue(false); 171 172 if (nan == nan) 173 Main.assertTrue(false); 174 } 175 176 public static void run() { 177 testIntCompare(-5, 4, 4, 0); 178 testLongCompare(-5L, -4294967287L, 4L, 8L); 179 180 testFloatCompare(-5.0f, 4.0f, 4.0f, (1.0f/0.0f) / (1.0f/0.0f)); 181 testDoubleCompare(-5.0, 4.0, 4.0, (1.0/0.0) / (1.0/0.0)); 182 } 183 } 184
