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<body><span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - dEQP-GLES3: asin, acos, acosh do not have enough precision"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89635">bug 89635</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">Assignee</td>
<td>idr@freedesktop.org
</td>
<td>currojerez@riseup.net
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - dEQP-GLES3: asin, acos, acosh do not have enough precision"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89635#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - dEQP-GLES3: asin, acos, acosh do not have enough precision"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89635">bug 89635</a>
from <span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
</span></b>
<pre>Curro recently did some work in this area:
commit a6046d217d14130a46f6ffe42992fd745551a928
Author: Francisco Jerez <<a href="mailto:currojerez@riseup.net">currojerez@riseup.net</a>>
Date: Wed Mar 2 23:50:04 2016 -0800
glsl: Improve the accuracy of the acos() approximation.
The adjusted polynomial coefficients come from the numerical
minimization of the L2 norm of the relative error. The old
coefficients would give a maximum relative error of about 15000 ULP in
the neighborhood around acos(x) = 0, the new ones give a relative
error bounded by less than 2000 ULP in the same neighborhood.
Fixes four dEQP subtests:
dEQP-GLES31.functional.shaders.builtin_functions.precision.acos.
highp_compute.{scalar,vec2,vec3,vec4}
All the tests seem to be passing these days. So, marking this Resolved/Fixed.</pre>
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