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// Copyright 2018 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 --opt
// Test the extreme case where -0 is produced by rounding errors.
(function() {
function bar(x) {
return 1e-308 * x;
}
bar(1);
function foo() {
return Object.is(-0, bar(-1e-308));
}
assertTrue(foo());
assertTrue(foo());
%OptimizeFunctionOnNextCall(foo);
assertTrue(foo());
})();
// Test that multiplication of integer by 0 produces the correct results.
(function() {
function foo(x) {
return 0 * Math.round(x);
}
assertEquals(0, foo(0.1));
assertEquals(-0, foo(-0.1));
assertEquals(NaN, foo(NaN));
assertEquals(NaN, foo(Infinity));
assertEquals(NaN, foo(-Infinity));
%OptimizeFunctionOnNextCall(foo);
assertEquals(0, foo(0.1));
assertEquals(-0, foo(-0.1));
assertEquals(NaN, foo(NaN));
assertEquals(NaN, foo(Infinity));
assertEquals(NaN, foo(-Infinity));
})();
// Test that multiplication properly preserves -0 and NaN, and doesn't
// cut it short incorrectly.
(function() {
function foo(x, y) {
x = Math.sign(x);
y = Math.sign(y);
return Math.min(x * y, 0);
}
assertEquals(0, foo(1, 0));
assertEquals(-0, foo(1, -0));
assertEquals(NaN, foo(NaN, -0));
%OptimizeFunctionOnNextCall(foo);
assertEquals(0, foo(1, 0));
assertEquals(-0, foo(1, -0));
assertEquals(NaN, foo(NaN, -0));
})();
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