Hi 64 bit int’s with 128 bit intermediate results can do a pretty good job for most of this.
Bob On Mar 26, 2014, at 6:47 PM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: > In message <5333314d.5090...@rubidium.dyndns.org>, Magnus Danielson writes: > >> Did some home-work on third-degree PLL parameters, so now I know why I >> failed, as I never tried to do it right. > > Once you get to third-order PLLs you need to start paying serious > attention to rounding errors. > > In most cases using a "double" floating point format will do, but you > have to make sure you don't loose precision to normalisation in > your additions. > > I've had varying degress of success myself, and overall I'm not > sure it really makes sense to fight the battles, unless you need > really long hold-over times. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > p...@freebsd.org | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
