xceptions when changing FPU operating modes, clear any pending exceptions (using the FCLEX or FNCLEX instruction) before loading the new control word.</p>
<p>This instruction’s operation is the same in non-64-bit modes and 64-bit mode.</p>
<h2 id="operation">Operation<a class="anchor" href="#operation">
			¶
		</a></h2>
<pre>FPUControlWord ← SRC;
</pre>
<h2 id="fpu-flags-affected">FPU Flags Affected<a class="anchor" href="#fpu-flags-affected">
			¶
		</a></h2>
<table>
<tr>
<td>C0, C1, C2, C3</td>
<td>