function umuldw( a, b ) {
	return fcn( a, b, [ 0, 0 ], 1, 0 );
}
Performs multiplication of two unsigned 32-bit integers and returns an array of two unsigned 32-bit integers which represents the unsigned 64-bit integer product.

@param {uinteger32} a - integer
@param {uinteger32} b - integer
@returns {Array<number>} output array

@example
var v = umuldw( 0xAAAAAAAA, 0x55555555 );
// returns [ 954437176, 1908874354 ]