RippleCarryAdder constructor

RippleCarryAdder(
  1. Logic a,
  2. Logic b, {
  3. Logic? carryIn,
  4. String name = 'ripple_carry_adder_carry_in',
})

Constructs an n-bit adder based on inputs List of inputs.

Implementation

RippleCarryAdder(super.a, super.b,
    {Logic? carryIn, super.name = 'ripple_carry_adder_carry_in'}) {
  if (carryIn != null) {
    carryIn = addInput('carry_in', carryIn, width: carryIn.width);
  }
  Logic? carry;
  final sumList = <Logic>[];
  for (var i = 0; i < a.width; i++) {
    final fullAdder =
        FullAdder(a: a[i], b: b[i], carryIn: carry ?? (carryIn ?? Const(0)));

    carry = fullAdder.carryOut;
    sumList.add(fullAdder.sum);
  }

  sumList.add(carry!);

  sum <= sumList.rswizzle();
}