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      <base href="https://bugs.llvm.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [AMDGPU][MC][GFX8+] Instructions v_sub_u16_e64, v_subrev_u16_e64 and v_add_u16_e64 do not support clamp modifier"
   href="https://bugs.llvm.org/show_bug.cgi?id=45926">45926</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[AMDGPU][MC][GFX8+] Instructions v_sub_u16_e64, v_subrev_u16_e64 and v_add_u16_e64 do not support clamp modifier
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libraries
          </td>
        </tr>

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

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

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

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

        <tr>
          <th>Severity</th>
          <td>enhancement
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Backend: AMDGPU
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>dpreobrazhensky@luxoft.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>According to sp3 documentation, both _e64 and _sdwa variants of these opcodes
should support clamp. However llvm assembler supports clamp for _sdwa variants
only.

These opcodes were renamed to v_*_nc_u16 in gfx10 - they should also be
corrected to support clamp.

Examples of failed tests:

    v_sub_u16_e64 v5, v1, v2 clamp    // gfx8, gfx9
    v_sub_nc_u16 v5, v1, v2 clamp     // gfx10

An example of a passed test:

    v_sub_u16_sdwa v5, v1, v2 clamp   // gfx8, gfx9</pre>
        </div>
      </p>


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