| // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| // Test a new statement by itself. |
| // VMOptions=--optimization-counter-threshold=4 --no-use-osr |
| |
| // @dart = 2.9 |
| |
| import 'dart:typed_data'; |
| |
| import "package:expect/expect.dart"; |
| |
| double uint64toDouble(int i) { |
| var buffer = new Uint8List(8).buffer; |
| var bdata = new ByteData.view(buffer); |
| bdata.setUint64(0, i); |
| return bdata.getFloat64(0); |
| } |
| |
| double createOtherNAN() { |
| return uint64toDouble((1 << 64) - 2); |
| } |
| |
| main() { |
| var otherNAN = createOtherNAN(); |
| for (int i = 0; i < 100; i++) { |
| Expect.isFalse(checkIdentical(double.nan, -double.nan)); |
| Expect.isTrue(checkIdentical(double.nan, double.nan)); |
| Expect.isTrue(checkIdentical(-double.nan, -double.nan)); |
| |
| Expect.isFalse(checkIdentical(otherNAN, -otherNAN)); |
| Expect.isTrue(checkIdentical(otherNAN, otherNAN)); |
| Expect.isTrue(checkIdentical(-otherNAN, -otherNAN)); |
| |
| var a = otherNAN; |
| var b = double.nan; |
| Expect.isFalse(checkIdentical(a, b)); |
| Expect.isFalse(checkIdentical(-a, -b)); |
| Expect.isFalse(checkIdentical(-a, b)); |
| Expect.isFalse(checkIdentical(a, -b)); |
| |
| a = -a; |
| Expect.isFalse(checkIdentical(a, b)); |
| Expect.isFalse(checkIdentical(-a, -b)); |
| Expect.isFalse(checkIdentical(-a, b)); |
| Expect.isFalse(checkIdentical(a, -b)); |
| |
| Expect.isTrue(checkIdentical(-(-a), a)); |
| Expect.isTrue(checkIdentical(-(-b), b)); |
| } |
| } |
| |
| checkIdentical(a, b) => identical(a, b); |