function fromWords( high, low ) {
	return addon( high, low );
}
Creates a double-precision floating-point number from a higher order word (unsigned 32-bit integer) and a lower order word (unsigned 32-bit integer).

@private
@param {uinteger32} high - higher order word (unsigned 32-bit integer)
@param {uinteger32} low - lower order word (unsigned 32-bit integer)
@returns {number} floating-point number

@example
var v = fromWords( 1774486211, 2479577218 );
// returns 3.14e201

@example
var v = fromWords( 3221823995, 1413754136 );
// returns -3.141592653589793

@example
var v = fromWords( 0, 0 );
// returns 0.0

@example
var v = fromWords( 2147483648, 0 );
// returns -0.0

@example
var v = fromWords( 2146959360, 0 );
// returns NaN

@example
var v = fromWords( 2146435072, 0 );
// returns Infinity

@example
var v = fromWords( 4293918720, 0 );
// returns -Infinity