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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [radv] - Persona 5 in RPCS3 emulator has glitches when using hardware fp16 (LLVM 9)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111039">111039</a>
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<th>Summary</th>
<td>[radv] - Persona 5 in RPCS3 emulator has glitches when using hardware fp16 (LLVM 9)
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Vulkan/radeon
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
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<th>Reporter</th>
<td>asheldon55@gmail.com
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
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<p>
<div>
<pre>Since RPCS3 added support for native 16-bit float support, Persona 5 is
exhibiting graphical glitches when using its Vulkan renderer:
With hardware fp16:
<a href="https://i.imgur.com/NOyfaN7.jpg">https://i.imgur.com/NOyfaN7.jpg</a>
With hardware fp16 disabled (correct rendering):
<a href="https://i.imgur.com/7oYKdBi.jpg">https://i.imgur.com/7oYKdBi.jpg</a>
System:
Gentoo AMD64
Mesa git (RADV)
LLVM 9 git
RPCS3 git
Vega 56
Here's a link to the corresponding RPCS3 report:
<a href="https://github.com/RPCS3/rpcs3/issues/6150">https://github.com/RPCS3/rpcs3/issues/6150</a>
They suggest the problem may be with LLVM code generation. I should note that
AMDVLK also has the same bug, which supports this conclusion. LLVM 8 can't be
tested since it causes a black screen with RPCS3
(<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [RADV] texelFetch not working when multiple texel buffer inputs are bound"
href="show_bug.cgi?id=110970">https://bugs.freedesktop.org/show_bug.cgi?id=110970</a>).
Also of note, bug doesn't occur with an RX-550 (on RADV or AMDVLK) and the bug
doesn't occur at all on Windows. So it looks to be a Vega specific bug, and
only on Linux.</pre>
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