use work.dlx_types.all, work.dlx_instr.all; entity reg_file is generic ( Tac : delay_length ); port ( a1 : in dlx_reg_addr; q1 : out dlx_word; a2 : in dlx_reg_addr; q2 : out dlx_word; a3 : in dlx_reg_addr; d3 : in dlx_word; write_en : in bit); end entity reg_file;