BOOL

BOOL returns a bit string that is the result of the Boolean operation z, on x and y. The length of the result is equal to that of the longer operand, x or y.

x and y

Expressions. x and y are converted to bit strings, if necessary. If x and y are of different lengths, the shorter is padded on the right with zeros to match the longer.

z

Expression. z is converted to a bit string of length 4, if necessary. When a bit from x is matched with a bit from y, the corresponding bit of the result is specified by a selected bit of z, as follows:

	x	y	Result
	0	0	bit 1 of z
	0	1	bit 2 of z
	1	0	bit 3 of z
	1	1	bit 4 of z