// 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/Inc16.hdl

/**
 * 16-bit incrementer:
 * out = in + 1 (arithmetic addition)
 */

CHIP Inc16 {
    IN in[16];
    OUT out[16];

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

}