The $ZBITXOR performs a bitwise exclusive OR on two bit strings, and returns a bit string equal in length to the shorter of the two arguments (containing set bits in those position where either but not both of the input strings have set bits). Positions that correspond to positions where neither or both input string has a set bit have cleared bits in the resulting string.
The format for the $ZBITXOR function is:
$ZBITXOR(expr1,expr2)
The first expression specifies one of the bit strings that is input to the XOR operation.
The second expression specifies the other bit string that is input to the XOR operation.