mirror of
https://github.com/nodejs/node.git
synced 2025-05-16 07:33:15 +00:00
4c4af643e5
PR-URL: https://github.com/nodejs/node/pull/17489 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Myles Borins <myles.borins@gmail.com> Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
40 lines
1.1 KiB
JavaScript
40 lines
1.1 KiB
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Flags: --allow-natives-syntax
|
|
|
|
// Ensure that the typing rule for Math.round deals correctly with
|
|
// inputs in the range [-0.5,0.0), which are mapped to -0.
|
|
(function() {
|
|
function foo(x) {
|
|
// Arrange x such that TurboFan infers type PlainNumber \/ NaN.
|
|
x = +x;
|
|
x = Math.abs(x) - 1.0;
|
|
return Object.is(-0, Math.round(x));
|
|
}
|
|
|
|
assertFalse(foo(1.5));
|
|
assertTrue(foo(0.5));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertFalse(foo(1.5));
|
|
assertTrue(foo(0.5));
|
|
})();
|
|
|
|
// Ensure that the typing rule for Math.round deals correctly with
|
|
// NaN inputs, which are mapped to NaN.
|
|
(function() {
|
|
function foo(x) {
|
|
// Arrange x such that TurboFan infers type PlainNumber \/ NaN.
|
|
x = +x;
|
|
x = Math.abs(x) - 1.0;
|
|
return Object.is(NaN, Math.round(x));
|
|
}
|
|
|
|
assertFalse(foo(1.5));
|
|
assertTrue(foo(NaN));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertFalse(foo(1.5));
|
|
assertTrue(foo(NaN));
|
|
})();
|