mirror of
https://github.com/nodejs/node.git
synced 2025-05-15 16:01:52 +00:00
60d1aac8d2
PR-URL: https://github.com/nodejs/node/pull/12784 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
29 lines
621 B
JavaScript
29 lines
621 B
JavaScript
// Copyright 2015 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.
|
|
|
|
var stdlib = { Math: Math };
|
|
|
|
var f = (function Module(stdlib) {
|
|
"use asm";
|
|
|
|
var clz32 = stdlib.Math.clz32;
|
|
|
|
function f(a) {
|
|
a = a | 0;
|
|
return clz32(a >>> 0) | 0;
|
|
}
|
|
|
|
return f;
|
|
})(stdlib);
|
|
|
|
assertEquals(32, f(0));
|
|
assertEquals(32, f(NaN));
|
|
assertEquals(32, f(undefined));
|
|
for (var i = 0; i < 32; ++i) {
|
|
assertEquals(i, f((-1) >>> i));
|
|
}
|
|
for (var i = -2147483648; i < 2147483648; i += 3999773) {
|
|
assertEquals(Math.clz32(i), f(i));
|
|
}
|