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| 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
| 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. |
| 4 // Test a new statement by itself. |
| 5 // VMOptions=--optimization-counter-threshold=4 --no-use-osr |
| 6 |
| 7 import 'dart:typed_data'; |
| 8 |
| 9 import "package:expect/expect.dart"; |
| 10 |
| 11 double uint64toDouble(int i) { |
| 12 var buffer = new Uint8List(8).buffer; |
| 13 var bdata = new ByteData.view(buffer); |
| 14 bdata.setUint64(0, i); |
| 15 return bdata.getFloat64(0); |
| 16 } |
| 17 |
| 18 double createOtherNAN() { |
| 19 return uint64toDouble((1 << 64) - 2); |
| 20 } |
| 21 |
| 22 main() { |
| 23 var otherNAN = createOtherNAN(); |
| 24 for (int i = 0; i < 100; i++) { |
| 25 Expect.isFalse(checkIdentical(double.NAN, -double.NAN)); |
| 26 Expect.isTrue(checkIdentical(double.NAN, double.NAN)); |
| 27 Expect.isTrue(checkIdentical(-double.NAN, -double.NAN)); |
| 28 |
| 29 Expect.isFalse(checkIdentical(otherNAN, -otherNAN)); |
| 30 Expect.isTrue(checkIdentical(otherNAN, otherNAN)); |
| 31 Expect.isTrue(checkIdentical(-otherNAN, -otherNAN)); |
| 32 |
| 33 var a = otherNAN; |
| 34 var b = double.NAN; |
| 35 Expect.isFalse(checkIdentical(a, b)); |
| 36 Expect.isFalse(checkIdentical(-a, -b)); |
| 37 Expect.isFalse(checkIdentical(-a, b)); |
| 38 Expect.isFalse(checkIdentical(a, -b)); |
| 39 |
| 40 a = -a; |
| 41 Expect.isFalse(checkIdentical(a, b)); |
| 42 Expect.isFalse(checkIdentical(-a, -b)); |
| 43 Expect.isFalse(checkIdentical(-a, b)); |
| 44 Expect.isFalse(checkIdentical(a, -b)); |
| 45 |
| 46 Expect.isTrue(checkIdentical(-(-a), a)); |
| 47 Expect.isTrue(checkIdentical(-(-b), b)); |
| 48 } |
| 49 } |
| 50 |
| 51 checkIdentical(a, b) => identical(a, b); |
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