title: In MIPS32, is "add $t1 $t1 $t1" the same as "sll $t1 $t1 1"
body: <p>I was wondering if in MIPS 32, the two following are identical:</p>
  <p><code>add $t1 $t1 $t1</code></p>
  <p><code>sll $t1 $t1 1</code></p>
  <p>Does <code>sll</code> handle a possible overflow differently than <code>add</code>? I can't seem to find a good explanation online.</p>
  <p>Thank you!</p>