Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
52 lines
1.6 KiB
Dart
52 lines
1.6 KiB
Dart
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test a new statement by itself.
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// VMOptions=--optimization-counter-threshold=4 --no-use-osr
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import 'dart:typed_data';
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import "package:expect/expect.dart";
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double uint64toDouble(int i) {
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var buffer = new Uint8List(8).buffer;
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var bdata = new ByteData.view(buffer);
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bdata.setUint64(0, i);
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return bdata.getFloat64(0);
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}
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double createOtherNAN() {
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return uint64toDouble((1 << 64) - 2);
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}
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main() {
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var otherNAN = createOtherNAN();
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for (int i = 0; i < 100; i++) {
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Expect.isFalse(checkIdentical(double.nan, -double.nan));
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Expect.isTrue(checkIdentical(double.nan, double.nan));
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Expect.isTrue(checkIdentical(-double.nan, -double.nan));
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Expect.isFalse(checkIdentical(otherNAN, -otherNAN));
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Expect.isTrue(checkIdentical(otherNAN, otherNAN));
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Expect.isTrue(checkIdentical(-otherNAN, -otherNAN));
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var a = otherNAN;
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var b = double.nan;
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Expect.isFalse(checkIdentical(a, b));
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Expect.isFalse(checkIdentical(-a, -b));
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Expect.isFalse(checkIdentical(-a, b));
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Expect.isFalse(checkIdentical(a, -b));
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a = -a;
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Expect.isFalse(checkIdentical(a, b));
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Expect.isFalse(checkIdentical(-a, -b));
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Expect.isFalse(checkIdentical(-a, b));
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Expect.isFalse(checkIdentical(a, -b));
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Expect.isTrue(checkIdentical(-(-a), a));
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Expect.isTrue(checkIdentical(-(-b), b));
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}
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}
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checkIdentical(a, b) => identical(a, b);
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