-- This file is public domain, it can be freely copied without restrictions.
-- SPDX-License-Identifier: CC0-1.0

library ieee;
use ieee.std_logic_1164.all;

entity dff is
port(
  clk: in std_logic;
  d: in std_logic;
  q: out std_logic);
end dff;

architecture behavioral of dff is
begin
  process (clk) begin
    if rising_edge(clk) then
      q <= d;
    end if;
  end process;
end behavioral;