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[Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Li

From: Rik
Subject: [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions
Date: Wed, 3 Aug 2022 13:43:11 -0400 (EDT)

Follow-up Comment #19, bug #49091 (project octave):

Tracing the code, acosh is a mapper function in libinterp which forwards to
liboctave.  In liboctave/numeric/lo-specfun.h there is a mapper of
octave::math::acosh to

    inline Complex acosh (const Complex& x) { return std::acosh (x); }

This looks alright to me.

@Markus: What happens if you make a .oct file which has the C++ code that
calls std::acosh and call that from Octave?

If that works, next step-wise change would be to use Complex and call
octave::numeric::acosh directly. 


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