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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [AMDGPU][MC][GFX9] Several VOP3 opcodes do not support op_sel"
href="https://bugs.llvm.org/show_bug.cgi?id=39302">39302</a>
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<th>Summary</th>
<td>[AMDGPU][MC][GFX9] Several VOP3 opcodes do not support op_sel
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: AMDGPU
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dpreobrazhensky@luxoft.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
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<pre>According with AMD docs, the following opcodes should support op_sel:
- v_alignbit_b32
- v_alignbyte_b32
- v_interp_p2_f16
Also there are 'legacy' opcodes:
- v_mad_legacy_f16
- v_mad_legacy_i16
- v_mad_legacy_u16
- v_fma_legacy_f16
- v_interp_p2_legacy_f16
- v_div_fixup_legacy_f16
These are labelled in SP3 as accepting op_sel; AMD docs says nothing about
that. I believe these legacy opcodes should not support op_sel because this
feature is not in GFX8.</pre>
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