--System input pins
sys_clk : in std_logic;
sys_res : in std_logic;
- reg1_rd_data : out gp_register_t;
- reg2_rd_data : out gp_register_t
-
+ result : out gp_register_t;
+ jump_result : out instruction_addr_t;
+ reg_wr_data : out gp_register_t
);
signal reg_w_addr_pin : std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
signal reg_wr_data_pin : gp_register_t;
signal reg_we_pin : std_logic;
+ signal to_next_stage : dec_op;
+
-- signal reg1_rd_data_pin : gp_register_t;
-- signal reg2_rd_data_pin : gp_register_t;
+ signal result_pin : gp_register_t;--reg
+ signal result_addr_pin : gp_addr_t;--reg
+ signal addr_pin : word_t; --memaddr
+ signal data_pin : gp_register_t; --mem data --ureg
+ signal alu_jump_pin : std_logic;--reg
+ signal brpr_pin : std_logic; --reg
+ signal wr_en_pin : std_logic;--regop --reg
+ signal dmem_pin : std_logic;--memop
+ signal dmem_wr_en_pin : std_logic;
+ signal hword_pin : std_logic;
+ signal byte_s_pin : std_logic;
+ signal nop_pin : std_logic;
+ -- extension signals
+ signal ext_gpmp : extmod_rec;
+ signal pointer : pointer_count;
+ signal dec_in,p_en : std_logic;
+ signal data_out : gp_register_t;
+ signal pointer_val : gp_register_t;
+
begin
reg_w_addr => reg_w_addr_pin, --: in std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
reg_wr_data => reg_wr_data_pin, --: in gp_register_t;
reg_we => reg_we_pin, --: in std_logic;
+ nop => nop_pin,
--Data outputs
- reg1_rd_data => reg1_rd_data, --: gp_register_t;
- reg2_rd_data => reg2_rd_data, --: gp_register_t;
branch_prediction_res => prediction_result_pin, --: instruction_word_t;
- branch_prediction_bit => branch_prediction_bit_pin --: std_logic
+ branch_prediction_bit => branch_prediction_bit_pin, --: std_logic
+ to_next_stage => to_next_stage
+ );
+
+ exec_st : execute_stage
+ generic map('0')
+ port map(sys_clk, sys_res,to_next_stage, reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, result_pin, result_addr_pin,addr_pin,
+ data_pin, alu_jump_pin,brpr_pin, wr_en_pin, dmem_pin,dmem_wr_en_pin,hword_pin,byte_s_pin);
+
+ writeback_st : writeback_stage
+ generic map('0', '1')
+ port map(sys_clk, sys_res, result_pin, result_addr_pin, addr_pin, data_pin, alu_jump_pin, brpr_pin,
+ wr_en_pin, dmem_pin, dmem_wr_en_pin, hword_pin, byte_s_pin,
+ reg_wr_data_pin, reg_we_pin, reg_w_addr_pin, jump_result_pin, alu_jump_bit_pin);
+
+
+ gpmp_inst : extension
+ generic map ('0')
+ port map (
+ sys_clk,
+ sys_reset,
+ ext_gpmp,
+ pointer,
+ dec_in,
+ p_en,
+ data_out,
+ pointer_val
);
--init : process(all)
--begin
- jump_result_pin <= (others => '0');
- alu_jump_bit_pin <= '0';
- reg_w_addr_pin <= (others => '0');
- reg_wr_data_pin <= (others => '0');
- reg_we_pin <= '0';
+-- jump_result_pin <= (others => '0');
+-- alu_jump_bit_pin <= '0';
+-- reg_w_addr_pin <= (others => '0');
+-- reg_wr_data_pin <= (others => '0');
+-- reg_we_pin <= '0';
--end process;
+ result <= result_pin;
+ nop_pin <= (alu_jump_bit_pin xor brpr_pin);
+
+ jump_result <= jump_result_pin;
+ reg_wr_data <= reg_wr_data_pin;
end behav;