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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW, regression, bisected] i965: Add LINTERP/CINTERP to can_do_cmod() (d91390634)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89317">89317</a>
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<th>Summary</th>
<td>[HSW, regression, bisected] i965: Add LINTERP/CINTERP to can_do_cmod() (d91390634)
</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
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
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<th>Reporter</th>
<td>itoral@igalia.com
</td>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<pre>Steps to reproduce:
$ cd <deqp-home>
$ cd modules/gles3
$ ./deqp-gles3 -n
dEQP-GLES3.functional.shaders.builtin_functions.precision.sign.lowp_fragment.vec2
(...)
Test run totals:
Passed: 0/1 (0.0%)
Failed: 1/1 (100.0%)
Not supported: 0/1 (0.0%)
Warnings: 0/1 (0.0%)
The complete list of affected dEQP tests is:
dEQP-GLES3.functional.shaders.builtin_functions.precision.sign.lowp_fragment.vec2
dEQP-GLES3.functional.shaders.builtin_functions.precision.sign.lowp_fragment.vec3
dEQP-GLES3.functional.shaders.builtin_functions.precision.sign.mediump_fragment.vec2
dEQP-GLES3.functional.shaders.builtin_functions.precision.sign.mediump_fragment.vec3
The commit that introduced the regression is:
commit d91390634ff8c50b217d55372db186d03996e9f7
Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
Date: Fri Jan 23 21:58:51 2015 -0800
i965: Add LINTERP/CINTERP to can_do_cmod().
LINTERP is implemented as a PLN instruction or a LINE+MAC. PLN and MAC
can do conditional mod. CINTERP is just a MOV.
total instructions in shared programs: 5952103 -> 5950284 (-0.03%)
instructions in affected programs: 324573 -> 322754 (-0.56%)
helped: 1819
We lose the SIMD16 in one Unigine Heaven shader which appears six times
in shader-db.</pre>
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