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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BSW regression] dEQP-GLES3.functional.shaders.precision.int.highp_mul_vertex"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91970#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BSW regression] dEQP-GLES3.functional.shaders.precision.int.highp_mul_vertex"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91970">bug 91970</a>
from <span class="vcard"><a class="email" href="mailto:krh@bitplanet.net" title="Kristian Høgsberg <krh@bitplanet.net>"> <span class="fn">Kristian Høgsberg</span></a>
</span></b>
<pre>(In reply to Matt Turner from <a href="show_bug.cgi?id=91970#c4">comment #4</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=118317" name="attach_118317" title="patch">attachment 118317</a> <a href="attachment.cgi?id=118317&action=edit" title="patch">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=91970&attachment=118317'>[review]</a> [review]
> patch
>
> The relevant instructions generated are
>
> mul(8) g124<1>D g6<8,8,1>D g10<8,8,1>UW { align1 1Q
> };
> mul(8) g7<1>D g6<8,8,1>D g10<8,8,1>UW { align1 1Q</span >
We're missing a .1 subreg offset on one of these.
<span class="quote">> };
> ...
> add(8) g124.1<2>UW g124.1<16,8,2>UW g7<16,8,2>UW { align1 1Q
> };
>
> I could imagine that the D * UW multiplies don't work as expected (maybe we
> should do D * W for signed multiplication?). Attached is a patch that gives
> that a try.</span ></pre>
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