title: How does asm("nop"); works?
body: <p>I red the definition from <a href="http://en.wikipedia.org/wiki/NOP">http://en.wikipedia.org/wiki/NOP</a> but I still need a simpler definition. </p>
  
  <p>I stumbled across a code and I don't know exactly what it does:</p>
  
  <pre><code>switch (Something)
      {
  
          case this_one:
              asm ("nop");
              break;
          case other_one:
              asm ("nop");
              break;
          default:
              asm ("nop");
              break;
      }
  </code></pre>