writeback.pat

i need of vhdl code for 32-bit risc processor

in       insir5out (15 downto 0) B;
in       alucalval (7 downto 0) B;
in       memoutdata (7 downto 0) B;
in       clock5 B;
in 	 reset5 B;
out      writebackval (7 downto 0) B;
out      writebackreg (2 downto 0) B;
out      writebackena B;

begin
p0 : 1010000010101000 00110011 01011111 0 0 ?uuuuuuuu ?uuu ?u;
p1 : 1010000010101000 00110011 01011111 1 0 ?00110011 ?010 ?1;
p3 : 0011000111010000 11110011 10100011 0 1 ?00110011 ?010 ?1;
p4 : 0011000111010000 11110011 10100011 1 1 ?00000000 ?000 ?0;
end;