// 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; } })); } } f(5); f(5); %OptimizeFunctionOnNextCall(f); f(40);