// 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/1/Mux.hdl
/**
 * Multiplexor:
 * if (sel = 0) out = a, else out = b
 */
CHIP Mux {
    IN a, b, sel;
    OUT out;

    PARTS:
    // sel=0 picks a, sel=1 picks b
    Not(in=sel, out=tmp1);
    And(a=a, b=tmp1, out=tmp2);
    And(a=b, b=sel, out=tmp3);
    Or(a=tmp2, b=tmp3, out=out);
}