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// Copyright 2014 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
[NaN, Infinity, -Infinity, 0, -0, "abc", "Infinity", "-Infinity", {}].forEach(
function(x) {
assertEquals(32, Math.clz32(x));
}
);
function testclz(x) {
for (var i = 0; i < 33; i++) {
if (x & 0x80000000) return i;
x <<= 1;
}
return 32;
}
function f(e) {
var max = Math.pow(2, e);
for (var x = 0; x < max; x = x * 1.01 + 1) {
assertEquals(testclz(x), Math.clz32(x));
assertEquals(testclz(-x), Math.clz32(-x));
assertEquals(testclz(x), Math.clz32({ valueOf: function() { return x; } }));
assertEquals(testclz(-x),
Math.clz32({ toString: function() { return -x; } }));
}
}
%PrepareFunctionForOptimization(f);
f(5);
f(5);
%OptimizeFunctionOnNextCall(f);
f(40);
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