CheckZero16.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/02/Adder16.hdl

/*
 * Adds two 16-bit values.
 * The most-significant carry bit is ignored.
 */

CHIP CheckZero16 {
    IN in[16];
    OUT zero,nonzero;

    PARTS:
   // Put you code here:
    Or(a=in[0],b=in[1],out=x);
    Or(a=in[2],b=in[3],out=y);
    Or(a=in[4],b=in[5],out=z);
    Or(a=in[6],b=in[7],out=u);
    Or(a=in[8],b=in[9],out=i);
    Or(a=in[10],b=in[11],out=j);
    Or(a=in[12],b=in[13],out=k);
    Or(a=in[14],b=in[15],out=l);
    Or(a=x,b=y,out=f);
    Or(a=z,b=u,out=g);
    Or(a=f,b=g,out=h);
    Or(a=i,b=j,out=m);
    Or(a=k,b=l,out=n);
    Or(a=m,b=n,out=o);
    Or(a=h,b=o,out=p);
    Or(a=p,b=false,out=nonzero);
    Not(in=p,out=zero);    
}