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<body><span class="vcard"><a class="email" href="mailto:itoral@igalia.com" title="Iago Toral <itoral@igalia.com>"> <span class="fn">Iago Toral</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - Bad int(floatBitsToInt(vec4))"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89508">bug 89508</a>
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<th>What</th>
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<td style="text-align:right;">Attachment #114257 is obsolete</td>
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</td>
<td>1
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Bad int(floatBitsToInt(vec4))"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89508#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Bad int(floatBitsToInt(vec4))"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89508">bug 89508</a>
from <span class="vcard"><a class="email" href="mailto:itoral@igalia.com" title="Iago Toral <itoral@igalia.com>"> <span class="fn">Iago Toral</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=114260" name="attach_114260" title="Simplest piglit shader_test showcasing the problem">attachment 114260</a> <a href="attachment.cgi?id=114260&action=edit" title="Simplest piglit shader_test showcasing the problem">[details]</a></span>
Simplest piglit shader_test showcasing the problem
This is the simplest version of the shader test I could get. By comparing the
generated vec4 code for the case that fails:
addr0 = int(floatBitsToInt(temps[5].xxxx))
and the case that passes:
addr0 = int(floatBitsToInt(temps[10].x));
it seems that the problem is that we are losing this code in the failed
version:
mov(8) g126<1>UD g0<4,4,1>UD { align16 WE_all 1Q };
mov(1) g127<1>UD 0x0000000aUD { align1 WE_all compacted };
mov(1) g127.4<1>UD 0x0000000bUD { align1 WE_all compacted };
send(8) g27<1>F g126<4,4,1>F
data ( DC OWORD dual block read, 255, 0) mlen 2 rlen 1 { align16 1Q };
so we are losing a variable load into a register that for some reason.</pre>
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