1 // Copyright 2008 The Android Open Source Project 2 3 4 5 /** 6 * Test comparison operators. 7 */ 8 public class Compare { 9 10 /* 11 * Test the integer comparisons in various ways. 12 */ testIntCompare(int minus, int plus, int plus2, int zero)13 static void testIntCompare(int minus, int plus, int plus2, int zero) { 14 System.out.println("IntMath.testIntCompare"); 15 16 if (minus > plus) 17 assert(false); 18 if (minus >= plus) 19 assert(false); 20 if (plus < minus) 21 assert(false); 22 if (plus <= minus) 23 assert(false); 24 if (plus == minus) 25 assert(false); 26 if (plus != plus2) 27 assert(false); 28 29 /* try a branch-taken */ 30 if (plus != minus) { 31 assert(true); 32 } else { 33 assert(false); 34 } 35 36 if (minus > 0) 37 assert(false); 38 if (minus >= 0) 39 assert(false); 40 if (plus < 0) 41 assert(false); 42 if (plus <= 0) 43 assert(false); 44 if (plus == 0) 45 assert(false); 46 if (zero != 0) 47 assert(false); 48 49 if (zero == 0) { 50 assert(true); 51 } else { 52 assert(false); 53 } 54 } 55 56 /* 57 * Test cmp-long. 58 * 59 * minus=-5, alsoMinus=0xFFFFFFFF00000009, plus=4, alsoPlus=8 60 */ testLongCompare(long minus, long alsoMinus, long plus, long alsoPlus)61 static void testLongCompare(long minus, long alsoMinus, long plus, 62 long alsoPlus) { 63 64 System.out.println("IntMath.testLongCompare"); 65 if (minus > plus) 66 assert(false); 67 if (plus < minus) 68 assert(false); 69 if (plus == minus) 70 assert(false); 71 72 if (plus >= plus+1) 73 assert(false); 74 if (minus >= minus+1) 75 assert(false); 76 77 /* try a branch-taken */ 78 if (plus != minus) { 79 assert(true); 80 } else { 81 assert(false); 82 } 83 84 /* compare when high words are equal but low words differ */ 85 if (plus > alsoPlus) 86 assert(false); 87 if (alsoPlus < plus) 88 assert(false); 89 if (alsoPlus == plus) 90 assert(false); 91 92 /* high words are equal, low words have apparently different signs */ 93 if (minus < alsoMinus) // bug! 94 assert(false); 95 if (alsoMinus > minus) 96 assert(false); 97 if (alsoMinus == minus) 98 assert(false); 99 } 100 101 /* 102 * Test cmpl-float and cmpg-float. 103 */ testFloatCompare(float minus, float plus, float plus2, float nan)104 static void testFloatCompare(float minus, float plus, float plus2, 105 float nan) { 106 107 System.out.println("IntMath.testFloatCompare"); 108 if (minus > plus) 109 assert(false); 110 if (plus < minus) 111 assert(false); 112 if (plus == minus) 113 assert(false); 114 if (plus != plus2) 115 assert(false); 116 117 if (plus <= nan) 118 assert(false); 119 if (plus >= nan) 120 assert(false); 121 if (minus <= nan) 122 assert(false); 123 if (minus >= nan) 124 assert(false); 125 if (nan >= plus) 126 assert(false); 127 if (nan <= plus) 128 assert(false); 129 130 if (nan == nan) 131 assert(false); 132 } 133 testDoubleCompare(double minus, double plus, double plus2, double nan)134 static void testDoubleCompare(double minus, double plus, double plus2, 135 double nan) { 136 137 System.out.println("IntMath.testDoubleCompare"); 138 if (minus > plus) 139 assert(false); 140 if (plus < minus) 141 assert(false); 142 if (plus == minus) 143 assert(false); 144 if (plus != plus2) 145 assert(false); 146 147 if (plus <= nan) 148 assert(false); 149 if (plus >= nan) 150 assert(false); 151 if (minus <= nan) 152 assert(false); 153 if (minus >= nan) 154 assert(false); 155 if (nan >= plus) 156 assert(false); 157 if (nan <= plus) 158 assert(false); 159 160 if (nan == nan) 161 assert(false); 162 } 163 run()164 public static void run() { 165 testIntCompare(-5, 4, 4, 0); 166 testLongCompare(-5L, -4294967287L, 4L, 8L); 167 168 testFloatCompare(-5.0f, 4.0f, 4.0f, (1.0f/0.0f) / (1.0f/0.0f)); 169 testDoubleCompare(-5.0, 4.0, 4.0, (1.0/0.0) / (1.0/0.0)); 170 } 171 } 172