Re: Intermediate step for new arch for lc040 compatibility

[Romain Dolbeau <romain%dolbeau.org@localhost>]

Le sam. 3 mai 2025 à 18:13, Michael van Elst <mlelstv%serpens.de@localhost> a écrit :
> It's '881/'882 and we provide the FPSP for running on 040/060.

OK, thank you!

I wonder how many of the "removed" instructions actually appear in the
NetBSD distribution (the full base system, excluding pkgsrc). I don't
remember ever seeing a numerical code actually using things like
hyperbolic trigonometry, and even regular trigonometry is not that
common compared to square roots, divisions and
exponentials/logarithms.

(I am curious as I've actually started drafting a FPGA-based FPU for
the '020/'030 <https://github.com/MelkhiorVintageComputing/IIsiFPGA/blob/master/IIsi-to-ztex-gateware/rd68883.py>
using FloPoCo <https://www.flopoco.org/> for the operators, but i'm
only targeting the '040 subset as that's already pretty complex...
computing is easy [for standard operators], exceptions/flags/... are
hard!).

Cordially,

-- 
Romain Dolbeau