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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [AMDGPU][MC] Incorrect detection of unsupported instructions on errors"
href="https://bugs.llvm.org/show_bug.cgi?id=42590">42590</a>
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<th>Summary</th>
<td>[AMDGPU][MC] Incorrect detection of unsupported instructions on errors
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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
</td>
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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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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Assembler often reports an operand error when the actual reason is that
instruction is not supported. For example, the following instruction is not
supported on GFX8, but assembler issues an "invalid operand" error:
v_swap_b32 v1, 0
A related problem is that when assembler do report "instruction not supported
on this GPU", it may also be incorrect. These errors are caused by unsupported
operands or their combinations. For example:
v_add_co_ci_u32_e32 v3, vcc_lo, v3, v4, vcc_lo
When this instruction is assembled for GFX10 with wavesize=64, assembler
incorrectly reports that the instruction is not supported which is not the
case.</pre>
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</p>
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