test262/website/harness/math_precision.js

14 lines
409 B
JavaScript

// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
function getPrecision(num)
{
//TODO: Create a table of prec's,
// because using Math for testing Math isn't that correct.
log2num = Math.log(Math.abs(num))/Math.LN2;
pernum = Math.ceil(log2num);
return(2 * Math.pow(2, -52 + pernum));
//return(0);
}