Inc16 Chip

Abstraction and Implementation of 16-bit Incrementer Chip in Hardware Design Language and Java™.

Inc16 (16-bit Incrementer) Chip

16-bit Incrementer chip is a special kind of Adder, used to increment a 16-bit input by 1.

Chip name: Inc16
Inputs: in[16]
Outputs: out[16]
Function: out=in+1
Comment: Integer 2’s complement addition.
Overflow is neither detected nor handled.

While this diagram is not a 16-bit binary incrementer, the implementation is similar to this.

Implementation of 16-bit Incrementer Chip in HDL

The function in the above abstraction can help in the implementation of 16-bit Incrementer Chip.

You can use the Add16 Chip you've built earlier.

Remember that 1 in 4-bit binary (say) is 0001.

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

    PARTS:
   Add16(a=in, b[0]=true, out=out);
}

Implementation of 16-bit Incrementer Chip in Java™

Similar to the Implementation in HDL

package CombChips;

class Inc16_Gate extends Add16_Gate {
    
    protected static int[] Inc16(int[] in) {
        int[] b = new int[16];
        b[b.length-1] = 1;

        return Add16(in, b);
    }
}

The Most Significant Bit is dropped.