John Messerly
51 lines
1.6 KiB
Dart
51 lines
1.6 KiB
Dart
// 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
|
|
|
|
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); |