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<title>XSETBV—Set Extended Control Register </title></head>
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<h1>XSETBV—Set Extended Control Register</h1>
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<th>Opcode</th>
<th>Instruction</th>
<th>Op/En</th>
<th>64-Bit Mode</th>
<th>Compat/Leg Mode</th>
<th>Description</th></tr>
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<td>0F 01 D1</td>
<td>XSETBV</td>
<td>NP</td>
<td>Valid</td>
<td>Valid</td>
<td>Write the value in EDX:EAX to the XCR specified by ECX.</td></