correctly rounded mathematical functions

Paul Zimmermann
Thu Jan 6 10:12:02 GMT 2022

       Dear Joel,

> I hate to ask since I know this is unrelated but what is the best source for
> properly licensed and accurate long double methods. I am still hoping that
> part of an RTEMS GSoC project is to merge them from somewhere into
> newlib.

as far as I know, four libraries provide long double functions:
GNU libc, Intel Math Library, OpenLibm and Musl. See Table 11 from

And of course we also plan to provide (correctly rounded) long double
functions, acos and cbrt are already available on the CORE-MATH page.

> And I'm thrilled at all the autoconf/automake work. That has really
> been a challenge
> for students.

Best regards,

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