nction</td>
        <td>input</td>
        <td align="center">4</td>
        <td>A binary code to determine the function of the ALU.</td>
    </tr>
    <tr>
        <td>enable</td>
        <td>input</td>
        <td align="center">1</td>
        <td>ALU enable signal.</td>
    </tr>
    <tr>
        <td>ALU_result_valid</td>
        <td>output</td>
        <td align="center">1</td>
        <td>A signal to indicate the ALU result is valid.</td>
    </tr>
    <tr>
        <td>ALU_result</td>
        <td>outpu