nctions return the exponent
of <i class="var">x</i>. If <i class="var">x</i> is zero, infinite and
a NaN, they return <b>SLEEF_FP_ILOGB0</b>, <b>INT_MAX</b>
and <b>SLEEF_FP_ILOGBNAN</b>, respectively.
</p>


<h2 id="tutorial">Tutorial</h2>

<p class="noindent">
  I would like to show an example of how the vectorized QP functions
  can be used. Below is <a class="underlined" href="machinx86.c">a
  source code</a> for computing &pi; with <a class="underlined"
  href="https://en.wikipedia.org/wiki/Machin-like_