[Octave-bug-tracker] [bug #42583] log2() returns inaccurate result for many integer powers of 2, unlike Matlab

[Rik]

Follow-up Comment #24, bug #42583 (project octave):

I don't understand either.  The function std::exp2 shouldn't have any relation
to qrupdate library.

Have you tried enabling 64-bit libraries, but no other optimizations besides
-O2?  My guess would still be that one of the tuning options such as
'-march=native' or '-flto' might cause this.


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