U2 U1 U0
0 0 0 ADD = A + B + C0
0 0 1 SUB = A - B - E0
0 1 0 INCA = A + 1 + C0
0 1 1 DECA = A - 1 - E0
1 0 0 AND = A & B
1 0 1 OR = A | B
1 1 0 XOR = A ^ B
1 1 1 NOT = ~A