 (<code class="mendoza-code">instruction &gt;&gt; 16</code>). Used for
        instructions of two arguments, like move, normal function calls,
        conditionals, etc.</li>
    <li>3 arg - Bytes 2, 3, and 4 each correspond to an 8-bit argument.
        Used for arithmetic operations, emitting a signal, etc.</li></ul><p>These instruction variants can be further refined based on the semantics of the
arguments.  Some instructions may treat an argument as a slot index, while other
instructions will treat the