title: C rotl32 alternative
body: <p>is there an alternative for <code>rotl32</code> in C language?</p>
  
  <p>i found this: <a href="https://stackoverflow.com/questions/31387778/near-constant-time-rotate-that-does-not-violate-the-standards/31488147#31488147">Near constant time rotate that does not violate the standards</a>
  but still trying to get an optimized one</p>
  
  <p>my code:</p>
  
  <pre><code>k0 = rotl32 ((k3 ^ k2 ^ k ^ k0), 1u)
  </code></pre>