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// 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);