Re: Time to evaluate the CORE-MATH project?

yeah, i'm interested in switching Android's libm over to the llvm-libc
routines, but not until i can do it by taking a whole family of f/d/ld
variants at a time...

On Mon, Feb 10, 2025 at 12:25 PM Steve Kargl
<sgk@troutmask.apl.washington.edu> wrote:
>
> On Mon, Feb 10, 2025 at 04:14:00PM +0000, Pedro Giffuni wrote:
> > Quoting a recent posting in hackers@:https://lists.freebsd.org/archives/freebsd-hackers/2025-February/004304.txt
> > From: Paul Zimmermann <Paul.Zimmermann_at_inria.fr>Date: Mon, 10 Feb 2025 08:53:53 UTC       Dear all,
> > a new update of our comparison is available, with FreeBSD 14.2:
> > https://members.loria.fr/PZimmermann/papers/accuracy.pdf
> > Main changes in this update:
> > * GNU libc now provides 21 correctly-rounded functions in single precision  (integrating the CORE-MATH code)* LLVM-libc provides more correctly-rounded functions
> > Brian GladmanVincenzo InnocenteJohn MatherPaul Zimmermann______
> > The code is under an MIT license:https://core-math.gitlabpages.inria.fr/
>
> From the table, code is available for float and for double except
> lgamma.  There are only 6 functions implemented for LD80 long
> double and no code for LD128 long double.  This suggest that if
> someone starts importing parts of core-math, then freebsd's libm
> will be a mixture of msun and core-math, i.e, maintenance will
> become more challenging.  Someone has already imported a few
> routines from Cephus to cover missing functionality in LD128.
> I know bde would not look at cephus code, and I seldom look at
> it as there is no one to review a change if I made one.
>
> PS: The core-math LD80 routines would need to be tested on IA32
> due to the way FreeBSD sets the FPU to 53-bit precision.  Of
> course, FreeBSD may drop IA32 support, so this might not be an
> issue.
>
> --
> Steve
>