1// Copyright 2014 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Flags: --allow-natives-syntax
6
7[NaN, Infinity, -Infinity, 0, -0, "abc", "Infinity", "-Infinity", {}].forEach(
8  function(x) {
9    assertEquals(32, Math.clz32(x));
10  }
11);
12
13function testclz(x) {
14  for (var i = 0; i < 33; i++) {
15    if (x & 0x80000000) return i;
16    x <<= 1;
17  }
18  return 32;
19}
20
21
22function f(e) {
23  var max = Math.pow(2, e);
24  for (var x = 0; x < max; x = x * 1.01 + 1) {
25    assertEquals(testclz(x), Math.clz32(x));
26    assertEquals(testclz(-x), Math.clz32(-x));
27    assertEquals(testclz(x), Math.clz32({ valueOf: function() { return x; } }));
28    assertEquals(testclz(-x),
29                 Math.clz32({ toString: function() { return -x; } }));
30  }
31}
32
33f(5);
34f(5);
35%OptimizeFunctionOnNextCall(f);
36f(40);
37