val proto = SPIProtocol.decode(io.link.fmt.proto).zipWithIndex
val cnt_quot = Mux1H(proto.map { case (s, i) => s -> (io.ctrl.fmt.len >> i) })
val proto = SPIProtocol.decode(io.link.fmt.proto).zipWithIndex
val cnt_quot = Mux1H(proto.map { case (s, i) => s -> (io.ctrl.fmt.len >> i) })