| Line 58... |
Line 58... |
imm_i : in std_ulogic_vector(data_width_c-1 downto 0); -- immediate
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imm_i : in std_ulogic_vector(data_width_c-1 downto 0); -- immediate
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-- data output --
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-- data output --
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res_o : out std_ulogic_vector(data_width_c-1 downto 0); -- ALU result
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res_o : out std_ulogic_vector(data_width_c-1 downto 0); -- ALU result
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add_o : out std_ulogic_vector(data_width_c-1 downto 0); -- address computation result
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add_o : out std_ulogic_vector(data_width_c-1 downto 0); -- address computation result
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-- co-processor interface --
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-- co-processor interface --
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cp0_start_o : out std_ulogic; -- trigger co-processor 0
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cp_start_o : out std_ulogic_vector(7 downto 0); -- trigger co-processor i
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cp0_data_i : in std_ulogic_vector(data_width_c-1 downto 0); -- co-processor 0 result
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cp_valid_i : in std_ulogic_vector(7 downto 0); -- co-processor i done
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cp0_valid_i : in std_ulogic; -- co-processor 0 result valid
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cp_result_i : in cp_data_if_t; -- co-processor result
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cp1_start_o : out std_ulogic; -- trigger co-processor 1
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cp1_data_i : in std_ulogic_vector(data_width_c-1 downto 0); -- co-processor 1 result
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cp1_valid_i : in std_ulogic; -- co-processor 1 result valid
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cp2_start_o : out std_ulogic; -- trigger co-processor 2
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cp2_data_i : in std_ulogic_vector(data_width_c-1 downto 0); -- co-processor 2 result
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cp2_valid_i : in std_ulogic; -- co-processor 2 result valid
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cp3_start_o : out std_ulogic; -- trigger co-processor 3
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cp3_data_i : in std_ulogic_vector(data_width_c-1 downto 0); -- co-processor 3 result
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cp3_valid_i : in std_ulogic; -- co-processor 3 result valid
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-- status --
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-- status --
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wait_o : out std_ulogic -- busy due to iterative processing units
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wait_o : out std_ulogic -- busy due to iterative processing units
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);
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);
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end neorv32_cpu_alu;
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end neorv32_cpu_alu;
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| Line 286... |
Line 277... |
if (rstn_i = '0') then
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if (rstn_i = '0') then
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cp_ctrl.cmd_ff <= '0';
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cp_ctrl.cmd_ff <= '0';
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cp_ctrl.busy <= '0';
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cp_ctrl.busy <= '0';
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elsif rising_edge(clk_i) then
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elsif rising_edge(clk_i) then
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cp_ctrl.cmd_ff <= cp_ctrl.cmd;
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cp_ctrl.cmd_ff <= cp_ctrl.cmd;
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if ((cp0_valid_i or cp1_valid_i or cp2_valid_i or cp3_valid_i) = '1') then -- cp computation done?
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if (or_all_f(cp_valid_i) = '1') then -- cp computation done?
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cp_ctrl.busy <= '0';
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cp_ctrl.busy <= '0';
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elsif (cp_ctrl.start = '1') then
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elsif (cp_ctrl.start = '1') then
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cp_ctrl.busy <= '1';
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cp_ctrl.busy <= '1';
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end if;
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end if;
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end if;
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end if;
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| Line 299... |
Line 290... |
-- is co-processor operation? --
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-- is co-processor operation? --
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cp_ctrl.cmd <= '1' when (ctrl_i(ctrl_alu_func1_c downto ctrl_alu_func0_c) = alu_func_cmd_copro_c) else '0';
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cp_ctrl.cmd <= '1' when (ctrl_i(ctrl_alu_func1_c downto ctrl_alu_func0_c) = alu_func_cmd_copro_c) else '0';
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cp_ctrl.start <= '1' when (cp_ctrl.cmd = '1') and (cp_ctrl.cmd_ff = '0') else '0';
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cp_ctrl.start <= '1' when (cp_ctrl.cmd = '1') and (cp_ctrl.cmd_ff = '0') else '0';
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|
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-- co-processor select --
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-- co-processor select --
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cp0_start_o <= '1' when (cp_ctrl.start = '1') and (ctrl_i(ctrl_cp_id_msb_c downto ctrl_cp_id_lsb_c) = "00") else '0';
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cp_operation_trigger: process(cp_ctrl, ctrl_i)
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cp1_start_o <= '1' when (cp_ctrl.start = '1') and (ctrl_i(ctrl_cp_id_msb_c downto ctrl_cp_id_lsb_c) = "01") else '0';
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begin
|
cp2_start_o <= '1' when (cp_ctrl.start = '1') and (ctrl_i(ctrl_cp_id_msb_c downto ctrl_cp_id_lsb_c) = "10") else '0';
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for i in 0 to 7 loop
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cp3_start_o <= '1' when (cp_ctrl.start = '1') and (ctrl_i(ctrl_cp_id_msb_c downto ctrl_cp_id_lsb_c) = "11") else '0';
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if (cp_ctrl.start = '1') and (ctrl_i(ctrl_cp_id_msb_c downto ctrl_cp_id_lsb_c) = std_ulogic_vector(to_unsigned(i, 3))) then
|
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cp_start_o(i) <= '1';
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else
|
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cp_start_o(i) <= '0';
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end if;
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end loop; -- i
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end process;
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|
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-- co-processor operation (still) running? --
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-- co-processor operation (still) running? --
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cp_ctrl.halt <= (cp_ctrl.busy and (not (cp0_valid_i or cp1_valid_i or cp2_valid_i or cp3_valid_i))) or cp_ctrl.start;
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cp_ctrl.halt <= (cp_ctrl.busy and (not or_all_f(cp_valid_i))) or cp_ctrl.start;
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|
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-- co-processor result --
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-- co-processor result - only the *actually selected* co-processor may output data != 0 --
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cp_res <= cp0_data_i or cp1_data_i or cp2_data_i or cp3_data_i; -- only the *actually selected* co-processor may output data != 0
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cp_res <= cp_result_i(0) or cp_result_i(1) or cp_result_i(2) or cp_result_i(3) or
|
|
cp_result_i(4) or cp_result_i(5) or cp_result_i(6) or cp_result_i(7);
|
|
|
|
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-- ALU Logic Core -------------------------------------------------------------------------
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-- ALU Logic Core -------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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-- -------------------------------------------------------------------------------------------
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alu_logic_core: process(ctrl_i, rs1_i, opb)
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alu_logic_core: process(ctrl_i, rs1_i, opb)
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