op the register stack.</td></tr>
<tr>
<td>DE C1</td>
<td>FADDP</td>
<td>Valid</td>
<td>Valid</td>
<td>Add ST(0) to ST(1), store result in ST(1), and pop the register stack.</td></tr>
<tr>
<td>DA /0</td>
<td>FIADD <em>m32int</em></td>
<td>Valid</td>
<td>Valid</td>
<td>Add <em>m32int</em> to ST(0) and store result in ST(0).</td></tr>
<tr>
<td>DE /0</td>
<td>FIADD <em>m16int</em></td>
<td>Valid</td>
<td>Valid</td>
<td>Add <em>m16int</em> to ST(0) and store result in ST(0).</td></tr></table>
<h2>Description</h2