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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 - [BDW/BSW/SKL Bisected]Piglit/glean@vertprog1-rsq_test_2_(reciprocal_square_root_of_negative_value) fais"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90547">90547</a>
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<th>Summary</th>
<td>[BDW/BSW/SKL Bisected]Piglit/glean@vertprog1-rsq_test_2_(reciprocal_square_root_of_negative_value) fais
</td>
</tr>
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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>All
</td>
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<th>OS</th>
<td>Linux (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>high
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=115938" name="attach_115938" title="output">attachment 115938</a> <a href="attachment.cgi?id=115938&action=edit" title="output">[details]</a></span>
output
System Environment:
--------------------------
Platform: BSW
Libdrm:
(master)libdrm-2.4.61-1-ge9ea1f42d14e10852f292f3470aee260c7349978
Mesa: (master)4ee69a97bb0af0cc216539c48b246ea2abf8f208
Xserver:
(master)xorg-server-1.17.0-146-gfc59c8fe8d941b0ec1e98c59bc57b1f97dba149d
Xf86_video_intel:(master)2.99.917-310-ge617c1941c4e5ee90b69221013aab799eace925d
Libva: (master)9bfde38f19d81b7f33db8c4c8e80420c9e60429e
Libva_intel_driver:(master)8dda0650b55c467200c34ada127b5d9b54edea5c
Kernel: (drm-intel-nightly)7e30ba951445ac86f6235a6cf55fc84730c1baf3
Bug detailed description:
-----------------------------
It fails on BDW/BSW/SKL with mesa master branch, it works well on 10.5 branch.
Bisect shows: 42298b05d1ebd8b17b89411723ae13295643e496 is the first bad commit
commit 42298b05d1ebd8b17b89411723ae13295643e496
Author: Jason Ekstrand <<a href="mailto:jason.ekstrand@intel.com">jason.ekstrand@intel.com</a>>
AuthorDate: Thu May 7 15:07:49 2015 -0700
Commit: Jason Ekstrand <<a href="mailto:jason.ekstrand@intel.com">jason.ekstrand@intel.com</a>>
CommitDate: Mon May 18 15:32:00 2015 -0700
i965: Use NIR by default for vertex shaders on GEN8+
GLSL IR vs. NIR shader-db results for SIMD8 vertex shaders on Broadwell:
total instructions in shared programs: 2742062 -> 2681339 (-2.21%)
instructions in affected programs: 1514770 -> 1454047 (-4.01%)
helped: 5813
HURT: 1120
The gained programs are ARB vertext programs that were previously going
through the vec4 backend. Now that we have prog_to_nir, ARB vertex
programs can go through the scalar backend so they show up as "gained" in
the shader-db results.
Acked-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Reviewed-by: Ian Romanick <<a href="mailto:ian.d.romanick@intel.com">ian.d.romanick@intel.com</a>>
Acked-by: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
Reproduce steps:
----------------------------
1. xinit
2. PIGLIT_TEST='RSQ test 2 (reciprocal square root of negative value)'
bin/glean -o -v -v -v -t +vertProg1</pre>
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