https://bugs.freedesktop.org/show_bug.cgi?id=94459
Bug ID: 94459
Summary: FLT_TO_INT rounding issues on pre R800 cards
Product: Mesa
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: minor
Priority: medium
Component: Drivers/Gallium/r600
Assignee: dri-devel at lists.freedesktop.org
Reporter: siro at das-labor.org
QA Contact: dri-devel at lists.freedesktop.org
Running WINE tests with Gallium Nine enabled I found the following test to fail
on pre R800 cards.
The failing test is from wine d3d9/tests/visual.c test_mova().
It can be found here: https://source.winehq.org/ident?_i=test_mova&_remember=1
To issue doesn't exists on radeonsi, softpipe and R800+.
The problem seems to be TGSI_OPCODE_ARR that should round on FLT_TO_INT, but
pre R800 cards truncate instead.
This might result in wrong addressing, as TGSI_OPCODE_ARR is expected to round.
If the card doesn't support rounding on FLT_TO_INT, r600 driver should insert a
rounding instruction.
Tested with latest mesa git on RV770.
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