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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>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [swrast] piglit fs-op-not-bool-using-if regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83573">bug 83573</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">CC</td>
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<td>brianp@vmware.com, maraeo@gmail.com
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [swrast] piglit fs-op-not-bool-using-if regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83573#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [swrast] piglit fs-op-not-bool-using-if regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83573">bug 83573</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>I thought Marek's patch (mesa: set UniformBooleanTrue = 1.0f by default) would
fix this, but it doesn't. Using integer 1 works.
Setting DEBUG_PROG = 1 in prog_execute.c and making ADD print values in
hexadecimal, I see:
----false case----
ADD (3f800000 3f800000 3f800000 3f800000) = (80000000 80000000 80000000
80000000
) + (3f800000 3f800000 3f800000 3f800000)
ADD (1 1 1 1) = (-0 -0 -0 -0) + (1 1 1 1)
----true case----
ADD (ce7e0000 ce7e0000 ce7e0000 ce7e0000) = (ce7e0000 ce7e0000 ce7e0000
ce7e0000) + (3f800000 3f800000 3f800000 3f800000)
ADD (-1.06535e+09 -1.06535e+09 -1.06535e+09 -1.06535e+09) = (-1.06535e+09
-1.06535e+09 -1.06535e+09 -1.06535e+09) + (1 1 1 1)
So, it looks like we're seeing 1.0f = 3f800000 numerically converted to a float
somewhere (rather than bitcast). 0x3f800000 = 1065353216 = 1.06535322E9. The
ADD negates op[0], giving -1.06535322E9 = 0xce7e0000.
I'm not sure where that's happening yet.</pre>
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