val [0.0, 1.0) with a 2 to the 128th-1 period</dd>
<dt class="col-md-4"> <samp>round()</samp></dt><dd class="col-md-8"> round to integral value, regardless of rounding direction</dd>
<dt class="col-md-4"> <samp>sign(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8"> return -1.0 if <var>x</var> is less than 0.0 otherwise 1.0</dd>
<dt class="col-md-4"> <samp>sin(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8"> sine function</dd>
<dt class="col-md-4"> <samp>sinc(</samp><var>x</var><samp>)</