n arrays are loaded into these variables with
  <a href="quadx86.xhtml#load"><b class="func">Sleef_loadq2_sse2</b></a>
  function. Vector operations are carried out from line 14 to 16, and
  then each element of the vector variable <i class="var">q3</i> is
  extracted
  with <a href="quadx86.xhtml#get"><b class="func">Sleef_getq2_sse2</b></a>
  function and subtracted to obtain the result at line 18. Note that
  the QP subtract function in the standard library is called to do
  this subtraction.  This resul