VHDLでマルチプレクサを10ステップでマスター

entity multiplexer_2to1 is
    Port ( A, B : in  STD_LOGIC;
           S : in  STD_LOGIC;
           Y : out  STD_LOGIC);
end multiplexer_2to1;

architecture Behavioral of multiplexer_2to1 is
begin
    process(A, B, S)
    begin
        if S = '0' then
            Y <= A;
        else
            Y <= B;
        end if;
    end process;
end Behavioral;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity multiplexer_2input is
    Port ( A : in  STD_LOGIC;
           B : in  STD_LOGIC;
           SELECT : in  STD_LOGIC;
           Y : out  STD_LOGIC);
end multiplexer_2input;

architecture Behavior of multiplexer_2input is
begin
    process(A, B, SELECT)
    begin
        -- 日本語のコメント：SELECT信号に基づいて、どちらの入力を出力に割り当てるかを決定
        if SELECT = '0' then
            Y <= A;
        else
            Y <= B;
        end if;
    end process;
end Behavior;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity chained_multiplexer is
    Port ( A : in  STD_LOGIC_VECTOR (2 downto 0); -- 8入力
           S : in  STD_LOGIC_VECTOR (2 downto 0); -- 3セレクト信号
           Y : out STD_LOGIC); -- 出力
end chained_multiplexer;

architecture Behavior of chained_multiplexer is
    signal inter_Y1, inter_Y2 : STD_LOGIC;
    signal S1, S2 : STD_LOGIC_VECTOR (1 downto 0);
begin
    S1 <= S(1 downto 0);
    S2 <= S(1) & S(0);

    process(A, S1, S2)
    begin
        case S1 is
            when "00" => inter_Y1 <= A(1);
            when "01" => inter_Y1 <= A(2);
            when "10" => inter_Y1 <= A(3);
            when others => inter_Y1 <= A(4);
        end case;

        case S2 is
            when "00" => inter_Y2 <= A(5);
            when "01" => inter_Y2 <= A(6);
            when "10" => inter_Y2 <= A(7);
            when others => inter_Y2 <= A(8);
        end case;
    end process;

    Y <= inter_Y1 when S(2) = '0' else inter_Y2;

end Behavior;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity signal_routing_mux is
    Port ( selector : in STD_LOGIC_VECTOR(1 downto 0);
           input0, input1, input2, input3 : in STD_LOGIC;
           output_signal : out STD_LOGIC);
end signal_routing_mux;

architecture Behavioral of signal_routing_mux is
begin
    process(selector, input0, input1, input2, input3)
    begin
        case selector is
            when "00" =>
                output_signal <= input0; -- 入力0を選択
            when "01" =>
                output_signal <= input1; -- 入力1を選択
            when "10" =>
                output_signal <= input2; -- 入力2を選択
            when others =>
                output_signal <= input3; -- 入力3を選択
        end case;
    end process;
end Behavioral;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity dynamic_signal_selector is
    Port ( inputA, inputB, inputC : in STD_LOGIC_VECTOR(2 downto 0);
           output_signal : out STD_LOGIC_VECTOR(2 downto 0));
end dynamic_signal_selector;

architecture Behavioral of dynamic_signal_selector is
begin
    process(inputA, inputB, inputC)
    begin
        if inputA > inputB and inputA > inputC then
            output_signal <= inputA; -- 入力Aが最も高い場合
        elsif inputB > inputA and inputB > inputC then
            output_signal <= inputB; -- 入力Bが最も高い場合
        else
            output_signal <= inputC; -- 入力Cが最も高い場合
        end if;
    end process;
end Behavioral;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

entity multiplexer_calc is
    Port ( A : in  STD_LOGIC_VECTOR(7 downto 0);
           B : in  STD_LOGIC_VECTOR(7 downto 0);
           Sel : in  STD_LOGIC_VECTOR(1 downto 0);
           Result : out  STD_LOGIC_VECTOR(7 downto 0));
end multiplexer_calc;

architecture Behavioral of multiplexer_calc is
begin
process(A, B, Sel)
begin
    -- 加算
    if Sel = "00" then
        Result <= A + B;
    -- 減算
    elsif Sel = "01" then
        Result <= A - B;
    -- 乗算
    elsif Sel = "10" then
        Result <= A * B;
    else
        Result <= (others => '0');
    end if;
end process;
end Behavioral;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity multiplexer_troubleshoot is
    Port ( A : in STD_LOGIC;
           B : in STD_LOGIC;
           select_signal : in STD_LOGIC;
           Y : out STD_LOGIC);
end multiplexer_troubleshoot;

architecture Behavior of multiplexer_troubleshoot is
begin
    process(A, B, select_signal)
    begin
        -- 入力信号の確認
        assert A /= 'X' and B /= 'X' report "入力信号が不正です。" severity ERROR;

        -- 選択信号の確認
        if select_signal = '0' then
            Y <= A;
        else
            Y <= B;
        end if;
    end process;
end Behavior;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity CustomMux is
    Port ( A, B, C : in STD_LOGIC;
           Sel : in STD_LOGIC_VECTOR(1 downto 0);
           Y : out STD_LOGIC);
end CustomMux;

architecture Behavioral of CustomMux is
begin
    process(A, B, C, Sel)
    begin
        -- 通常のマルチプレクサの動作
        case Sel is
            when "00" => Y <= A;
            when "01" => Y <= B;
            when "10" => 
                -- 独自の機能: Cが'1'のときのみAを出力
                if C = '1' then
                    Y <= A;
                else
                    Y <= B;
                end if;
            when others => Y <= '0';
        end case;
    end process;
end Behavioral;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity OptimizedMux is
    Port ( D : in STD_LOGIC_VECTOR(3 downto 0);
           Sel : in STD_LOGIC_VECTOR(1 downto 0);
           Y : out STD_LOGIC);
end OptimizedMux;

architecture Behavioral of OptimizedMux is
begin
    Y <= D(TO_INTEGER(UNSIGNED(Sel)));
end Behavioral;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity large_mux is
    Port ( select_signal : in  STD_LOGIC_VECTOR (3 downto 0);
           data_inputs   : in  STD_LOGIC_VECTOR (15 downto 0);
           output_data   : out STD_LOGIC);
end large_mux;

architecture Behavior of large_mux is
begin
    process(select_signal, data_inputs)
    begin
        case select_signal is
            when "0000" => output_data <= data_inputs(0);
            when "0001" => output_data <= data_inputs(1);
            -- 以下の行は同じ方法で続きます
            when others => output_data <= '0'; -- 不正なセレクト信号には0を出力
        end case;
    end process;
end Behavior;

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity tb_large_mux is
end tb_large_mux;

architecture sim of tb_large_mux is
    signal test_select : STD_LOGIC_VECTOR (3 downto 0);
    signal test_input  : STD_LOGIC_VECTOR (15 downto 0);
    signal test_output : STD_LOGIC;

    -- マルチプレクサのインスタンス化
    component large_mux
        Port ( select_signal : in  STD_LOGIC_VECTOR (3 downto 0);
               data_inputs   : in  STD_LOGIC_VECTOR (15 downto 0);
               output_data   : out STD_LOGIC);
    end component;

begin
    uut: large_mux port map(test_select, test_input, test_output);

    process
    begin
        -- テストケースの設定
        test_input <= "0000000000000001";
        test_select <= "0000";
        wait for 10 ns;
        test_select <= "0001";
        wait for 10 ns;
        -- 以下の行も同じ方法で続きます
        wait;
    end process;
end sim;