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

/**
 * Half adder. Computes sum, the least significnat bit of a + b,
 * and carry, the most significnat bit of a + b.
 */

CHIP HalfAdder {

    IN  a, b;
    OUT sum,   // LSB of a + b
        carry; // MSB of a + b

    BUILTIN HalfAdder;
}