cpu_lib.vhd

来自「16位CUPIP核,完全运行的好的东西,可以直接拿来用的!」· VHDL 代码 · 共 47 行

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
package cpu_lib is

--type t_shift 
subtype  t_shift is unsigned (2 downto 0);
constant shftpass:unsigned(2 downto 0):= "000";
constant 	 sftl:unsigned(2 downto 0):= "001";
constant     sftr:unsigned(2 downto 0):= "010";
constant     rotl:unsigned(2 downto 0):= "011";
constant     rotr:unsigned(2 downto 0):= "100";

subtype  t_alu is unsigned(3 downto 0);
constant alupass : unsigned(3 downto 0) := "0000";
constant andOp : unsigned(3 downto 0) := "0001";
constant orOp : unsigned(3 downto 0) := "0010";
constant notOp : unsigned(3 downto 0) := "0011";
constant xorOp : unsigned(3 downto 0) := "0100";
constant plus : unsigned(3 downto 0) := "0101";
constant alusub : unsigned(3 downto 0) := "0110";
constant inc : unsigned(3 downto 0) := "0111";
constant dec : unsigned(3 downto 0) := "1000";
constant zero : unsigned(3 downto 0) := "1001";

subtype t_comp is unsigned (2 downto 0);
constant 	 eq: unsigned (2 downto 0):= "000";
constant 	neq: unsigned (2 downto 0):= "001";
constant 	 gt: unsigned (2 downto 0):= "010";
constant 	gte: unsigned (2 downto 0):= "011";
constant 	 lt: unsigned (2 downto 0):= "100";
constant 	lte: unsigned (2 downto 0):= "101";


subtype t_reg is std_logic_vector(2 downto 0);
type state is (reset1, reset2, reset3, reset4, reset5,
	reset6, execute, nop, load, store, move,
	load2, load3, load4, store2, store3,
	store4, move2, move3, move4,incPc, incPc2,
	incPc3, incPc4, incPc5, incPc6, loadPc,
	loadPc2,loadPc3, loadPc4, bgtI2, bgtI3,
	bgtI4, bgtI5, bgtI6, bgtI7,bgtI8, bgtI9,
	bgtI10, braI2, braI3, braI4, braI5, braI6,
	loadI2,loadI3, loadI4, loadI5, loadI6,
	inc2, inc3, inc4);
subtype bit16 is std_logic_vector(15 downto 0);
end cpu_lib;