[Octave-bug-tracker] [bug #48363] __run-test_suite_ FAILs for data-cc.tst ('NaN' mismatches)

[Rik]

Follow-up Comment #3, bug #48363 (project octave):

It is probably worth tracing this code down.  It runs from Flog2 in data.cc in
libinterp to liboctave/numeric/lo-mappers.cc.  We are using C++ std::log2, but
also std::log and std::frexp.  Testing with a Windows VM shows there is a
clear difference when different code paths are used.


f = log2 ([Inf, -Inf])
f =

       Inf + 0.00000i       Inf + 4.53236i


This result is the same as Linux.

The two argument form, which is the failing one, is


[f, e] = log2 ([Inf, -Inf])
f =

   NaN   NaN

e =

  -1  -1




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