Xor.hdl

// This file is part of www.nand2tetris.org
// and the book "The Elements of Computing Systems"
// by Nisan and Schocken, MIT Press.
// File name: projects/01/Xor.hdl

/**
 *  Exclusive-or gate:
 *  out = not (a == b)
 */

CHIP Xor {
    IN a, b;
    OUT out;

    PARTS:
    Not(in=a,out=Nota);
    Not(in=b,out=Notb);
    And(a=a,b=Notb,out=w1);
    And(a=Nota,b=b,out=w2);
    Or(a=w1,b=w2,out=out);
}