library verilog;use verilog.vl_types.all;entity dffe is    port(        q               : out    vl_logic;        clk             : in     vl_logic;        ena             : in     vl_logic;        d               : in     vl_logic;        clrn            : in     vl_logic;        prn             : in     vl_logic    );end dffe;