https://bugs.freedesktop.org/show_bug.cgi?id=102382
Bug ID: 102382
Summary: nv50ir: isImmediate doesn't properly work for integers
if Value is typed as float
Product: xorg
Version: git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Driver/nouveau
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Created attachment 133728
--> https://bugs.freedesktop.org/attachment.cgi?id=133728&action=edit
TGSI
codegen should generate a texfetch instruction with a lod according to
IMM[1].xxxx, which is of value 2, but in
https://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp#n140
the isInteger(0) call assumes the Value being a F32, which leads to a is
2.8E-45 == 0 check returning true resulting into the lod argument being removed
from texfetch.
This causes a fail in the KHR-GL44.robust_buffer_access_behavior.texel_fetch
CTS test.
Other isInteger calls might be broken as well where an immediate of type float
is interpreted as int by the instruction.
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