Comment # 18
on bug 105333
from Axel Davy
PixWin enables to use ProcessVertices which outputs the vs shader outputs. I looked at the output which would give the IN[4].w If found that for llvmpipe (used for ProcessVertices) the vs output is between 0 and 1. However I tried with radeonsi, and... it displays a NaN for that output... I guess one of the input is NaN and llvmpipe clamps it (the vs output is the subtraction between two vs inputs). If that output is really NaN, I guess it can explain the regression. A small change (x < 0 vs 0 > x) will give different result with NaN. I tried to change the order for the test in radeonsi's kil_emit, but the generated isa doesn't change the test order between 0 and x.
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