 <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>
      <td><a href="https://wg21.link/n2752">N2752</a></td>
      <td class="full" align="center">Clang 3.1</td>
    </tr>

    <tr>
      <td>Memory model</td>
      <td><a href="https://wg21.link/n2429">N2429</a></td>
      <td class="full" align="center">Clang 3.2</td>