// 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 Add16 {
    IN a[16], b[16];
    OUT out[16];

    PARTS:
   HalfAdder(a=a[0], b=b[0], sum=out[0], carry=carry1);
   FullAdder(a=a[1], b=b[1], c=carry1, sum=out[1], carry=carry2);
   FullAdder(a=a[2], b=b[2], c=carry2, sum=out[2], carry=carry3);
   FullAdder(a=a[3], b=b[3], c=carry3, sum=out[3], carry=carry4);
   FullAdder(a=a[4], b=b[4], c=carry4, sum=out[4], carry=carry5);
   FullAdder(a=a[5], b=b[5], c=carry5, sum=out[5], carry=carry6);
   FullAdder(a=a[6], b=b[6], c=carry6, sum=out[6], carry=carry7);
   FullAdder(a=a[7], b=b[7], c=carry7, sum=out[7], carry=carry8);
   FullAdder(a=a[8], b=b[8], c=carry8, sum=out[8], carry=carry9);
   FullAdder(a=a[9], b=b[9], c=carry9, sum=out[9], carry=carry10);
   
   FullAdder(a=a[10],b=b[10],c=carry10,sum=out[10],carry=carry11);
   FullAdder(a=a[11],b=b[11],c=carry11,sum=out[11],carry=carry12);
   FullAdder(a=a[12],b=b[12],c=carry12,sum=out[12],carry=carry13);
   FullAdder(a=a[13],b=b[13],c=carry13,sum=out[13],carry=carry14);
   FullAdder(a=a[14],b=b[14],c=carry14,sum=out[14],carry=carry15);
   FullAdder(a=a[15],b=b[15],c=carry15,sum=out[15],carry=carry16);

   
}