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Jump only if branch acknowledges

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= 2024-02-01 07:49:29 +01:00
parent 8c4286cd90
commit d27dee2745
1 changed files with 9 additions and 7 deletions
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12
src/control.vhd
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@ -22,6 +22,7 @@ end Control;
architecture Implementation of Control is architecture Implementation of Control is
signal State : std_logic_vector(2 downto 0) := (others => '0'); signal State : std_logic_vector(2 downto 0) := (others => '0');
signal CouldJump : std_logic := '0';
begin begin
StateInterator : process(Clk) StateInterator : process(Clk)
@ -48,29 +49,30 @@ begin
case Instruction(3 downto 0) is case Instruction(3 downto 0) is
when "0000" | "0001" | "0010" | "0011" | "0100" | "0101" | "0110" | "0111" | "1000" | "1001" | "1010" | "1011" => when "0000" | "0001" | "0010" | "0011" | "0100" | "0101" | "0110" | "0111" | "1000" | "1001" | "1010" | "1011" =>
EnableRam <= '0'; EnableRam <= '0';
EnableJump <= '0'; CouldJump <= '0';
EnableRegs <= '1'; EnableRegs <= '1';
when "1100" => when "1100" =>
EnableRam <= '1'; EnableRam <= '1';
EnableJump <= '0'; CouldJump <= '0';
EnableRegs <= '0'; EnableRegs <= '0';
when "1110" => when "1110" =>
EnableRam <= '0'; EnableRam <= '0';
EnableJump <= '1'; CouldJump <= '1';
EnableRegs <= '0'; EnableRegs <= '0';
when others => when others =>
EnableRam <= '0'; EnableRam <= '0';
EnableJump <= '0'; CouldJump <= '0';
EnableRegs <= '0'; EnableRegs <= '0';
end case; end case;
when others => when others =>
EnablePC <= '0'; EnablePC <= '0';
EnableRam <= '0'; EnableRam <= '0';
EnableJump <= '0'; CouldJump <= '0';
EnableRegs <= '0'; EnableRegs <= '0';
end case; end case;
end process SetEnableSignals; end process SetEnableSignals;
EnableJump <= CouldJump and JumpSuggest;
StateOut <= State; StateOut <= State;