https://bugs.freedesktop.org/show_bug.cgi?id=78161
Priority: medium
Bug ID: 78161
Assignee: [email protected]
Summary: [NV96] Artifacts in output of fragment program
containing not unrolled loops with conditional break
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: [email protected]
Hardware: x86-64 (AMD64)
Status: NEW
Version: git
Component: Drivers/DRI/nouveau
Product: Mesa
Created attachment 98301
--> https://bugs.freedesktop.org/attachment.cgi?id=98301&action=edit
apitrace of simple test program.
Problem appear in shaders containing loops with conditional break when loop is
not unrolled by nouveau. I checked emitted code with ST_DEBUG=tgsi
NV50_PROG_DEBUG=1.
Tested with Mesa 10.2.0-devel (git-475f5ff) from 2014-04-30.
This bug exists for more than year, I first saw it in 2013-02.
I think that artifacts appear in areas where is big difference in number of
iterations executed for pixel before breaking from loop.
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