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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 - [ILK Bisected]some piglit and ogles2conform cases fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79963">bug 79963</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;">Status</td>
<td>ASSIGNED
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ILK Bisected]some piglit and ogles2conform cases fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79963#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ILK Bisected]some piglit and ogles2conform cases fail"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79963">bug 79963</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>commit 97d03b9366bfa55b27feb92aa5afacd9c5f6f421
Author: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Date: Sat Aug 16 15:18:21 2014 -0700
i965: Disable try_emit_b2f_of_compare on Gen4-6.
The optimization relies on CMP setting the destination to 0, which is
equivalent to 0.0f. However, early platforms only set the least
significant byte, leaving the other bits undefined. So, we must disable
the optimization on those platforms.
Oddly, Sandybridge wasn't reported as broken. The PRM states that it
only sets the LSB, but the internal documentation says that it follows
the IVB behavior. Since it wasn't reported as broken, we believe it
really does follow the IVB behavior.
v2: Allow the optimization on Sandybridge (requested by Matt).
+32 piglits on Ironlake.
Bugzilla: <a href="https://bugs.freedesktop.org/show_bug.cgi?=79963">https://bugs.freedesktop.org/show_bug.cgi?=79963</a>
Signed-off-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Reviewed-by: Chris Forbes <<a href="mailto:chrisf@ijw.co.nz">chrisf@ijw.co.nz</a>>
Reviewed-by: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>></pre>
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