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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SNB/IVB/BYT]Webglc conformance/glsl/functions/glsl-function-mix-float.html fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89095">89095</a>
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<th>Summary</th>
<td>[SNB/IVB/BYT]Webglc conformance/glsl/functions/glsl-function-mix-float.html fails
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>unspecified
</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>mattst88@gmail.com
</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>
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<th>CC</th>
<td>idr@freedesktop.org
</td>
</tr></table>
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<pre>System Environment:
--------------------------
Platform: SNB
Libdrm:
(master)libdrm-2.4.59-10-gde8532dd8359dfdaba839ff61fc9e2f05eaf57d3
Mesa: (master)ea0f0eb6c0a8b20bcce50c63170df94892a51142
Xserver:
(master)xorg-server-1.17.0-2-g20079c36cf7d377938ca5478447d8b9045cb7d43
Xf86_video_intel:
(master)2.99.917-111-g8ef3fdacac05ee93b685a93f6664696d026e889e
Libva: (master)f9741725839ea144e9a6a1827f74503ee39946c3
Libva_intel_driver: (master)9a20d6c34cb65e5b85dd16d6c8b3a215c5972b18
Kernel: drm-intel-nightly/34f9b98d3e64c8df349816115ea5a560a6763ce8
ug detailed description:
---------------------------
It fails on SNB/IVB/BYT with mesa master branch, works well on 10.4 branch.
conformance/glsl/functions/glsl-function-mix-gentype.html also fails with the
same bisect commit.
Bisect shows: 3d581f99963dea7e93a2f8fd819410da02c1cb7f is the first bad commit
is the first bad commit.
commit 3d581f99963dea7e93a2f8fd819410da02c1cb7f
Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
AuthorDate: Fri Dec 19 21:35:56 2014 -0800
Commit: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
CommitDate: Tue Feb 10 17:47:37 2015 -0800
i965/vec4: Emit MADs from (x + -(y * z)).
Same as commit c4fab711 to the fs backend.
total instructions in shared programs: 5945998 -> 5945788 (-0.00%)
instructions in affected programs: 74665 -> 74455 (-0.28%)
helped: 399
HURT: 180
It hurts some programs because we make no attempts in the vec4 backend
to avoid MADs if they have constant (or vector uniform) arguments.
Reviewed-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Reproduce steps:
-------------------------
1. xinit
2. go to
<a href="https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/webgl-conformance-tests.html">https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/webgl-conformance-tests.html</a>
run conformance/glsl/functions/glsl-function-mix-float.html</pre>
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