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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - dEQP-GLES3: textureOffset() call with isampler3d in vertex shader fails with U offset = 7."
href="https://bugs.freedesktop.org/show_bug.cgi?id=89639">89639</a>
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<th>Summary</th>
<td>dEQP-GLES3: textureOffset() call with isampler3d in vertex shader fails with U offset = 7.
</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>
</tr>
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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>idr@freedesktop.org
</td>
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<th>Reporter</th>
<td>siglesias@igalia.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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</tr></table>
<p>
<div>
<pre>The test checks that isampler3d is accessing properly an integer 3D texture
with a given offset using textureOffset() shader function. In this case, the
offset vector is (7, 3, -8).
According to the PRM, the valid values are from [-8, 7] because it's in 4-bits
two's complement, so 7 is the maximum and -8 the minimum. However, only when
the value of '7' is present in the first component (U offset) the bug appears.
If I change that value to any other one inside the valid range, it works fine.
By the way, If I modify textureOffset.usampler3d_vertex test to use the same
offset vector (7, 3, -8), it fails. It is not a surprise as it has the same
sampler type (sample_l). However, sampler3d test works fine in the same
conditions.
-----------
Mesa master: 27bf37ba05b69ebf6f373d1637a26b4839265921
Tested on Haswell.
How to reproduce it:
$ cd modules/gles3/
$ ./deqp-gles3 -n
dEQP-GLES3.functional.shaders.texture_functions.textureoffset.isampler3d_vertex</pre>
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