https://bugs.freedesktop.org/show_bug.cgi?id=47201
Bug #: 47201
Summary: TGSI source register with absolute negative modifier
does not work correctly
Classification: Unclassified
Product: Mesa
Version: 8.0
Platform: Other
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/r600
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: ll...@163.com
Recently I found a TGSI fragment shader does not render correctly with r600
driver and I further identified the issue down to instructions in this form:
CMP TEMP[0].yz, -|TEMP[1].xxxx|, TEMP[2].xxxx, CONST[0].xyxw
If I covert all those instructions to the equivalents:
ABS TEMP[5], TEMP[1].xxxx
CMP TEMP[0].yz, -TEMP[5], TEMP[2].xxxx, CONST[0].xyxw
It then works fine. However, the original instructions work just fine with
nouveau and swrast driver, so it should be a r600 bug. Any clue on this issue?
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