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| Author | SHA1 | Date | |
|---|---|---|---|
| 59cb94480e | |||
| 8b5b3095a0 |
@@ -327,10 +327,9 @@ begin
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when stEXEC => s_cycle_cnt <= stWB;
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when stEXEC => s_cycle_cnt <= stWB;
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when others => s_cycle_cnt <= stIF;
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when others => s_cycle_cnt <= stIF;
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end case;
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end case;
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else
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end if;
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if falling_edge(reset) then
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if falling_edge(reset) then
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s_cycle_cnt <= stIF;
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s_cycle_cnt <= stIF;
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end if;
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end if;
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end if;
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end process pc_cycle_control;
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end process pc_cycle_control;
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32
src/pc.vhd
32
src/pc.vhd
@@ -26,26 +26,22 @@ architecture pro_count of pc is
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signal addr_out : ram_addr_t := (others => '0');
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signal addr_out : ram_addr_t := (others => '0');
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signal addr_out_plus : ram_addr_t := (others => '0');
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signal addr_out_plus : ram_addr_t := (others => '0');
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begin
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begin
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process (clk)
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process (clk, reset)
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begin
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if rising_edge(clk) then
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if en_pc = "1" then
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-- count
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if doJump = "1" then
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addr_out <= addr_calc;
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-- jump
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else
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addr_out <= addr_out_plus;
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end if;
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end if;
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end if;
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end process;
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process (reset)
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begin
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begin
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if falling_edge(reset) then
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if falling_edge(reset) then
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addr_out <= (others => '0');
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addr_out <= (others => '0');
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addr_out_plus <= (others => '0');
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else
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if rising_edge(clk) then
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if en_pc = "1" then
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-- count
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if doJump = "1" then
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addr_out <= addr_calc;
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-- jump
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else
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addr_out <= addr_out_plus;
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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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end if;
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end process;
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end process;
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@@ -40,23 +40,19 @@ architecture structure of registers is
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begin
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begin
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-- react only on clock changes
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-- react only on clock changes
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process (clk) -- runs only, when clk changed
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process (clk, reset) -- runs only, when clk changed
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begin
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if rising_edge(clk) then
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-- check if write is enabled
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if to_integer(unsigned(write_enable)) = 1 then
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-- write data_in to wr_idx
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registerbench(to_integer(unsigned(wr_idx))) <= data_in;
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end if;
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registerbench(0) <= std_logic_vector(to_unsigned(0, wordWidth));
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end if;
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end process;
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-- reset if reset is activated
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process (reset)
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begin
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begin
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if falling_edge(reset) then
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if falling_edge(reset) then
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registerbench <= initRegs;
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registerbench <= initRegs;
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else
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if rising_edge(clk) then
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-- check if write is enabled
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if to_integer(unsigned(write_enable)) = 1 then
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-- write data_in to wr_idx
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registerbench(to_integer(unsigned(wr_idx))) <= data_in;
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end if;
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registerbench(0) <= std_logic_vector(to_unsigned(0, wordWidth));
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end if;
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end if;
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end if;
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end process;
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end process;
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