<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - neon: vmovn_high_* missing on Arm"
   href="https://bugs.llvm.org/show_bug.cgi?id=48194">48194</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>neon: vmovn_high_* missing on Arm
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>new bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>clang@evan.coeusgroup.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>According to Arm's documentation, vmovn_high_* are should be present on arm,
not just aarch64.  See:

 
<a href="https://developer.arm.com/architectures/instruction-sets/simd-isas/neon/intrinsics?search=vmovn_high">https://developer.arm.com/architectures/instruction-sets/simd-isas/neon/intrinsics?search=vmovn_high</a>

While clang support them on AArch64, they're missing on arm.  Example:
<a href="https://godbolt.org/z/7TE9G3">https://godbolt.org/z/7TE9G3</a>

I'm working around it by using something like (for vmovn_high_s16)
vcombine_s8(r, vmovn_s16(a)).

FWIW they're missing on gcc, too.</pre>
        </div>
      </p>


      <hr>
      <span>You are receiving this mail because:</span>

      <ul>
          <li>You are on the CC list for the bug.</li>
      </ul>
    </body>
</html>