="https://wg21.link/n2239">N2239</a></td>
      <td class="full" align="center">Clang 3.3</td>
    </tr>
    <tr>
      <td>Atomic operations</td>
      <td><a href="https://wg21.link/n2427">N2427</a></td>
      <td class="full" align="center">Clang 3.1</td>
    </tr>
    <tr>
      <td>Strong Compare and Exchange</td>
      <td><a href="https://wg21.link/n2748">N2748</a></td>
      <td class="full" align="center">Clang 3.1 <a href="#n2748">(3)</a></td>
    </tr>
    <tr>
      <td>Bidirectional Fences</td>