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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Fragment shader compilation broken with SIMD32"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110905">110905</a>
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<th>Summary</th>
<td>Fragment shader compilation broken with SIMD32
</td>
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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>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>eero.t.tamminen@intel.com
</td>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<p>
<div>
<pre>Setup:
* GEN9 HW
* Latest Mesa from git
Test-case:
1. Run something with SIMD32 fragment shaders
$ INTEL_DEBUG=do32 glxgears
Expected outcome:
* Everything works fine, like it did earlier, and it does with SIMD16
Actual outcome:
---------------------------------------------
glxgears: src/intel/compiler/brw_fs.cpp:1726: void
fs_visitor::assign_urb_setup(): Assertion `inst->src[i].offset < REG_SIZE / 2'
failed.
Aborted (core dumped)
---------------------------------------------
This has broken somewhere between:
* 2019-04-22 e983a975c6843c307380d7caa083eee89e02bd3c: gallivm: disable NEON
instructions if they are not supported
* 2019-04-23 951d60f8cdc886adff09201ff65002e3ee1a4c61: radeonsi: delay adding
BOs at the beginning of IBs until the first draw
(Not sure what severity this should have. SIMD32 is important performance
feature, e.g. on BXT it improves perf in one test-case by ~35%, and on average
several percents with suitable heuristic.)</pre>
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