 754 quad
  precision FP type, then <b class="type">Sleef_quad</b> is an alias of
  that data type.
</p>

<pre class="white">typedef __float128 Sleef_quad;</pre>
<pre class="white">typedef long double Sleef_quad;    // On AArch64 and System/390 systems</pre>

<p class="noindent">
  Otherwise, the library defines a 128-bit data type for retaining a number in
  IEEE 754 QP data format.
</p>


<h2 id="macro">Convenience function, macro and constants</h2>

<p class="funcname"><b id="sleef_q" class="func">sleef_