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<h2>
  <a name="1102166"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">biquad</font>
</h2><hr>


<p>
  <a name="1102169"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">biquad IIR filter step</font>
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<h5>
  <a name="1104993"> </a><i><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Code</font></i>
</h5>


<p>
  <a name="1102170"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">21 F7</font>
</p>


<h5>
  <a name="1105786"> </a><i><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Description</font></i>
</h5>


<p>
  <a name="1102171"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">Execute a step of a biquad IIR filter on vectors of 16-bit values. <span class=Signal>Areg</span> points to the C coefficient vector, <span class=Signal>Breg</span> points to the X input data vector and <span class=Signal>Creg</span> points to the Y results vector. <span class=Signal>Areg</span> must be word-aligned and <span class=Signal>Breg</span> and <span class=Signal>Creg</span> half-word aligned. <strong>biquad</strong> increments <span class=Signal>Breg</span> and <span class=Signal>Creg</span> by 2 bytes and performs the five multiply accumulates Y[2] = X[0].C[0] + X[1].C[1] + X[2].C[2] + Y[0].C[3] + Y[1].C[4].</font>
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<h5>
  <a name="1107827"> </a><i><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Definition</font></i>
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<p>
  <a name="1138659"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">if (overflow)<br>

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