"playpen"><code class="language-rust">#![feature(asm)]
fn main() {
    let t = 100;
    let t_ptr: *const usize = &amp;t;
    let x = dereference(t_ptr);
    
    println!(&quot;{}&quot;, x);
}

fn dereference(ptr: *const usize) -&gt; usize {
    let res: usize;
    unsafe { 
        asm!(&quot;mov ($1), $0&quot;:&quot;=r&quot;(res): &quot;r&quot;(ptr)) 
        };
    res
}
</code></pre></pre>
<blockquote>
<p>Here we write a <code>dereference</code> function using assembly instructions. We know there
is no