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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ES3.1CTS,BDW,SKL,BSW,SKL,KBL] gpu_shader5 prevents GEN8+ from passing CTS"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94395#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [ES3.1CTS,BDW,SKL,BSW,SKL,KBL] gpu_shader5 prevents GEN8+ from passing CTS"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94395">bug 94395</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>Here's a stab in the dark - we set nir_compiler_options::lower_ffma to true, to
try and allow for better CSE of MULs and ADDs. But this causes ffmas that came
from the actual fma() GLSL built-in, where the point is increased precision, to
be split up as well.
We probably want to avoid *creating* new ffmas, but avoid *splitting* ones that
come in from GLSL IR.</pre>
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