-- PKGMIPS.VHD Version 2.0
LIBRARY IEEE;
USE IEEE.Std_Logic_1164.all; 
PACKAGE mips IS
--  Revised 11/5/00
    CONSTANT DWordSize : POSITIVE := 8;
    CONSTANT DHWordSize : POSITIVE := DWordSize/2;
    CONSTANT DByteSize : POSITIVE := DWordSize/4;
    CONSTANT CWordSize : POSITIVE := 32;
--
    TYPE    State  is (S0, S1, S2, S3, S4, S5, S6, S7, S8, S9);
    SUBTYPE Opcode is std_logic_vector(5 downto 0);
    SUBTYPE rsAddr is std_logic_vector(4 downto 0);
    SUBTYPE rtAddr is std_logic_vector(4 downto 0);
    SUBTYPE rdAddr is std_logic_vector(4 downto 0);
    SUBTYPE Func   is std_logic_vector(5 downto 0);
    SUBTYPE shamt  is std_logic_vector(4 downto 0);
    SUBTYPE Addr   is std_logic_vector(25 downto 0);
    SUBTYPE nofst  is std_logic_vector(15 downto 0);
    CONSTANT Op_lw      :Opcode := B"100011";            
    CONSTANT Op_sw      :Opcode := B"101011";            
    CONSTANT Op_beq     :Opcode := B"000100";            
    CONSTANT Op_add     :Opcode := B"000000";            
    CONSTANT Op_sub     :Opcode := B"000000";            
    CONSTANT Op_and     :Opcode := B"000000";            
    CONSTANT Op_or      :Opcode := B"000000";            
    CONSTANT Op_slt     :Opcode := B"000000";            
    CONSTANT Op_j       :Opcode := B"100000";            
    CONSTANT Op_R_type  :Opcode := B"000000";            
    CONSTANT Func_add   :Opcode := B"010000";            
    CONSTANT Func_sub   :Opcode := B"010010";            
    CONSTANT Func_and   :Opcode := B"000100";            
    CONSTANT Func_or    :Opcode := B"010101";            
    CONSTANT Func_slt   :Opcode := B"011010";            
    SUBTYPE delay IS time;
END PACKAGE mips;