Created attachment 133728 [details] 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.
nothing was wrong with isImmediate, but the tetexfetch was fixed in 96be442b7795a6eb3d50f4061f2b98dddc39aa4d
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