[Bug 295089] [libm] implementation of rsqrt, rsqrtf, and rsqrtl.
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Date: Mon, 18 May 2026 08:09:11 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295089
Paul Zimmermann <Paul.Zimmermann@inria.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |Paul.Zimmermann@inria.fr
--- Comment #5 from Paul Zimmermann <Paul.Zimmermann@inria.fr> ---
with attachment 270556, I still get incorrect rounding for rsqrtf:
```
libm wrong by up to 5.01e-01 ulp(s) [1] for x=0x1.13e07p-129
rsqrt gives 0x1.5cc0a8p+64
mpfr_rsqrt gives 0x1.5cc0aap+64
Total: errors=129 (0.00%) errors2=0 maxerr=5.01e-01 ulp(s)
```
(I copied the auxiliary functions from
https://github.com/freebsd/freebsd-src.git.)
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