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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 // Dart test for testing bitwise operations. | 4 // Dart test for testing bitwise operations. |
5 | 5 |
6 class BitOperationsTest { | 6 class BitOperationsTest { |
7 static testMain() { | 7 static testMain() { |
8 for (int i = 0; i < 4; i++) { | 8 for (int i = 0; i < 4; i++) { |
9 testOne(); | 9 testOne(); |
10 } | 10 } |
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51 Expect.equals(0xF00000000, 15 << 32); | 51 Expect.equals(0xF00000000, 15 << 32); |
52 | 52 |
53 TestNegativeValueShifts(); | 53 TestNegativeValueShifts(); |
54 TestPositiveValueShifts(); | 54 TestPositiveValueShifts(); |
55 TestNoMaskingOfShiftCount(); | 55 TestNoMaskingOfShiftCount(); |
56 TestNegativeCountShifts(); | 56 TestNegativeCountShifts(); |
57 for (int i = 0; i < 1000; i++) { | 57 for (int i = 0; i < 1000; i++) { |
58 TestCornerCasesLeftShifts(); | 58 TestCornerCasesLeftShifts(); |
59 } | 59 } |
60 } | 60 } |
61 | 61 |
62 static void TestCornerCasesLeftShifts() { | 62 static void TestCornerCasesLeftShifts() { |
63 var v32 = 0xFF000000; | 63 var v32 = 0xFF000000; |
64 var v64 = 0xFF00000000000000; | 64 var v64 = 0xFF00000000000000; |
65 Expect.equals(0x3, v32 >> 0x1E); | 65 Expect.equals(0x3, v32 >> 0x1E); |
66 Expect.equals(0x1, v32 >> 0x1F); | 66 Expect.equals(0x1, v32 >> 0x1F); |
67 Expect.equals(0x0, v32 >> 0x20); | 67 Expect.equals(0x0, v32 >> 0x20); |
68 Expect.equals(0x3, v64 >> 0x3E); | 68 Expect.equals(0x3, v64 >> 0x3E); |
69 Expect.equals(0x1, v64 >> 0x3F); | 69 Expect.equals(0x1, v64 >> 0x3F); |
70 Expect.equals(0x0, v64 >> 0x40); | 70 Expect.equals(0x0, v64 >> 0x40); |
71 } | 71 } |
72 | 72 |
73 static void TestNegativeCountShifts() { | 73 static void TestNegativeCountShifts() { |
74 bool throwOnLeft(a, b) { | 74 bool throwOnLeft(a, b) { |
75 try { | 75 try { |
76 var x = a << b; | 76 var x = a << b; |
77 return false; | 77 return false; |
78 } catch(var e) { | 78 } catch (e) { |
79 return true; | 79 return true; |
80 } | 80 } |
81 } | 81 } |
82 | 82 |
83 bool throwOnRight(a, b) { | 83 bool throwOnRight(a, b) { |
84 try { | 84 try { |
85 var x = a >> b; | 85 var x = a >> b; |
86 return false; | 86 return false; |
87 } catch(var e) { | 87 } catch (e) { |
88 return true; | 88 return true; |
89 } | 89 } |
90 } | 90 } |
91 | 91 |
92 Expect.isTrue(throwOnLeft(12, -3)); | 92 Expect.isTrue(throwOnLeft(12, -3)); |
93 Expect.isTrue(throwOnRight(12, -3)); | 93 Expect.isTrue(throwOnRight(12, -3)); |
94 for (int i = 0; i < 4000; i++) { | 94 for (int i = 0; i < 4000; i++) { |
95 Expect.isFalse(throwOnLeft(12, 3)); | 95 Expect.isFalse(throwOnLeft(12, 3)); |
96 Expect.isFalse(throwOnRight(12, 3)); | 96 Expect.isFalse(throwOnRight(12, 3)); |
97 } | 97 } |
98 } | 98 } |
99 | 99 |
100 static void TestNegativeValueShifts() { | 100 static void TestNegativeValueShifts() { |
101 for (int value = 0; value > -100; value--) { | 101 for (int value = 0; value > -100; value--) { |
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132 } | 132 } |
133 } | 133 } |
134 | 134 |
135 static int ShiftLeft(int a, int b) { return a << b; } | 135 static int ShiftLeft(int a, int b) { return a << b; } |
136 static int ShiftRight(int a, int b) { return a >> b; } | 136 static int ShiftRight(int a, int b) { return a >> b; } |
137 } | 137 } |
138 | 138 |
139 main() { | 139 main() { |
140 BitOperationsTest.testMain(); | 140 BitOperationsTest.testMain(); |
141 } | 141 } |
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