| Line 30... |
Line 30... |
b_out : out std_logic_vector(31 downto 0);
|
b_out : out std_logic_vector(31 downto 0);
|
|
|
c_bus : in std_logic_vector(31 downto 0);
|
c_bus : in std_logic_vector(31 downto 0);
|
c_memory : in std_logic_vector(31 downto 0);
|
c_memory : in std_logic_vector(31 downto 0);
|
c_pc : in std_logic_vector(31 downto 0);
|
c_pc : in std_logic_vector(31 downto 0);
|
|
c_pc_plus4 : in std_logic_vector(31 downto 0);
|
c_mux : in c_source_type;
|
c_mux : in c_source_type;
|
reg_dest_out : out std_logic_vector(31 downto 0);
|
reg_dest_out : out std_logic_vector(31 downto 0);
|
|
|
branch_func : in branch_function_type;
|
branch_func : in branch_function_type;
|
take_branch : out std_logic);
|
take_branch : out std_logic);
|
| Line 81... |
Line 82... |
end if;
|
end if;
|
b_out(17 downto 0) <= imm_in & "00";
|
b_out(17 downto 0) <= imm_in & "00";
|
end case;
|
end case;
|
end process;
|
end process;
|
|
|
cmux: process(c_bus, c_memory, c_pc, imm_in, c_mux)
|
cmux: process(c_bus, c_memory, c_pc, c_pc_plus4, imm_in, c_mux)
|
begin
|
begin
|
case c_mux is
|
case c_mux is
|
when c_from_alu | c_from_shift | c_from_mult =>
|
when c_from_alu | c_from_shift | c_from_mult =>
|
reg_dest_out <= c_bus;
|
reg_dest_out <= c_bus;
|
when c_from_memory =>
|
when c_from_memory =>
|
reg_dest_out <= c_memory;
|
reg_dest_out <= c_memory;
|
when c_from_pc =>
|
when c_from_pc =>
|
reg_dest_out <= c_pc;
|
reg_dest_out <= c_pc(31 downto 3) & "000"; --backup one opcode
|
|
when c_from_pc_plus4 =>
|
|
reg_dest_out <= c_pc_plus4;
|
when c_from_imm_shift16 =>
|
when c_from_imm_shift16 =>
|
reg_dest_out <= imm_in & ZERO(15 downto 0);
|
reg_dest_out <= imm_in & ZERO(15 downto 0);
|
-- when from_reg_source_nez =>
|
-- when from_reg_source_nez =>
|
--????
|
--????
|
-- when from_reg_source_eqz =>
|
-- when from_reg_source_eqz =>
|
