GLSL: pow vs multiplication for integer exponent
<p>Which is faster in GLSL:</p>

<pre><code>pow(x, 3.0f);
</code></pre>

<p>or</p>

<pre><code>x*x*x;
</code></pre>

<p>?</p>

<p>Does exponentiation performance depend on hardware vendor or exponent value?</p>