sjolsen / nmigen-nexys Goto Github PK

@attr.s(auto_attribs=True)
class Adder(Elaboratable):
    width: int = attr.ib(validator=attr.validators.instance_of(int))
    a: Signal = attr.ib(init=False)
    b: Signal = attr.ib(init=False)
    result: Signal = attr.ib(init=False)

    def __attrs_post_init__(self) -> None:
        self.a = Signal(signed(self.width))
        self.b = Signal(signed(self.width))
        self.result = Signal(
            signed(self.width), reset_less=True, attrs={"use_dsp": "yes"}
        )

    def elaborate(self, platform: Platform) -> Module:
        m = Module()
        m.d.sync += self.result.eq(self.a + self.b)

        return m