efix Hints</h1>


<table>
<tr>
<th>Opcode/Instruction</th>
<th>64/32bit Mode Support</th>
<th>CPUID Feature Flag</th>
<th>Description</th></tr>
<tr>
<td>F2 XACQUIRE</td>
<td>V/V</td>
<td>HLE<sup>1</sup></td>
<td>A hint used with an “XACQUIRE-enabled“ instruction to start lock elision on the instruction memory operand address.</td></tr>
<tr>
<td>F3 XRELEASE</td>
<td>V/V</td>
<td>HLE</td>
<td>A hint used with an “XRELEASE-enabled“ instruction to end lock elision on the instruction memory operand addre