XOR Primitive
| 
                         Names:  | 
                         Description:  | 
|---|---|
| 
                         XOR  | 
                         OUT = logical exclusive OR of inputs IN1 and IN2  | 
Note: In Verilog HDL, you must use the built-in xor gate primitive to
            implement the XOR logic function. Go to Using a Verilog HDL Gate
            Primitive for more information.