Accuracy of Mathematical Functions
Paul Zimmermann
Paul.Zimmermann@inria.fr
Tue Aug 25 06:34:13 GMT 2026
Dear all,
a new update of our comparison is available:
https://members.loria.fr/PZimmermann/papers/accuracy.pdf
Main remarks about this update:
* more correctly-rounded functions in GNU libc and LLVM libc
* the Intel Math Library provides some cr_xxx functions: the user can choose
between the default function (log) and the correctly rounded one (cr_log)
* about two years after the adoption of C23, very few libraries implement
the new C23 functions
Specific to GNU libc, new binary64 correctly-rounded functions are cosh and
tanh (sinh will be in 2.45 due to an integration issue), and GNU libc is the
only one to provide all C23 functions (thanks to Joseph Myers).
Brian Gladman
Vincenzo Innocente
John Mather
Katsuhisa Ozaki
Paul Zimmermann
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