Subversion Repositories rise

-------------------------------------------------------------------------------

-- File: rise_const_pack.vhd

-- Author: Jakob Lechner, Urban Stadler, Harald Trinkl, Christian Walter

-- Created: 2006-11-29

-- Last updated: 2006-11-29

-- Description:

-- Package for RISE project.

-------------------------------------------------------------------------------

library IEEE;

use IEEE.STD_LOGIC_1164.all;

use IEEE.STD_LOGIC_ARITH.all;

package RISE_CONST_PACK is

  constant CONST_OPCODE_WIDTH : integer := 5;

  constant CONST_COND_WIDTH : integer := 3;

  subtype CONST_OPCODE_T is std_logic_vector(CONST_OPCODE_WIDTH-1 downto 0);

  subtype CONST_COND_T is std_logic_vector(CONST_COND_WIDTH-1 downto 0);

  -- RISE OPCODES --

  -- load opcodes

  constant CONST_OPCODE_LD_IMM        : CONST_OPCODE_T := "10000";

  constant CONST_OPCODE_LD_IMM_HB     : CONST_OPCODE_T := "10010";

  constant CONST_OPCODE_LD_DISP       : CONST_OPCODE_T := "10100";

  constant CONST_OPCODE_LD_DISP_MS    : CONST_OPCODE_T := "11000";

  constant CONST_OPCODE_LD_REG        : CONST_OPCODE_T := "00001";

  -- store opcodes

  constant CONST_OPCODE_ST_DISP       : CONST_OPCODE_T := "11100";

  -- arithmethic opcodes

  constant CONST_OPCODE_ADD           : CONST_OPCODE_T := "00010";

  constant CONST_OPCODE_ADD_IMM       : CONST_OPCODE_T := "00011";

  constant CONST_OPCODE_SUB           : CONST_OPCODE_T := "00100";

  constant CONST_OPCODE_SUB_IMM       : CONST_OPCODE_T := "00101";

  constant CONST_OPCODE_NEG           : CONST_OPCODE_T := "00110";

  constant CONST_OPCODE_ARS           : CONST_OPCODE_T := "00111";

  constant CONST_OPCODE_ALS           : CONST_OPCODE_T := "01000";

  -- logical opcodes

  constant CONST_OPCODE_AND : CONST_OPCODE_T := "01001";

  constant CONST_OPCODE_NOT : CONST_OPCODE_T := "01010";

  constant CONST_OPCODE_EOR : CONST_OPCODE_T := "01011";

  constant CONST_OPCODE_LS :  CONST_OPCODE_T := "01100";

  constant CONST_OPCODE_RS :  CONST_OPCODE_T := "01101";

  -- program control

  constant CONST_OPCODE_JMP : CONST_OPCODE_T := "01110";

  -- other

  constant CONST_OPCODE_TST : CONST_OPCODE_T := "01111";

  constant CONST_OPCODE_NOP : CONST_OPCODE_T := "00000";

  -- CONDITION CODES --

  constant CONST_COND_UNCONDITIONAL   : CONST_COND_T := "000";

  constant CONST_COND_NOT_ZERO        : CONST_COND_T := "001";

  constant CONST_COND_ZERO            : CONST_COND_T := "010";

  constant CONST_COND_CARRY           : CONST_COND_T := "011";

  constant CONST_COND_NEGATIVE        : CONST_COND_T := "100";

  constant CONST_COND_OVERFLOW        : CONST_COND_T := "101";

  constant CONST_COND_ZERO_NEGATIVE   : CONST_COND_T := "110";

end RISE_CONST_PACK;