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


More information about the Libc-alpha mailing list