Messages in this thread | | | Subject | Re: How to use floating point in a module? | Date | Mon, 31 May 2004 17:11:34 -0400 | From | Horst von Brand <> |
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Manfred Spraul <manfred@colorfullife.com> said: > Horst von Brand wrote: > >Trascendental functions are _not_ computed by series in practice, rational > >approximations (polinomial / polinomial) are used instead. Or interpolate > >in a smallish table.
> Is that really faster on modern cpus? The multiplier is fully pipelined > and a division takes 25-40 cycles.
You need smallish polinomials for double precision, via series it would take you a lot more terms (and then you get trouble from rounding etc).
No, numerical computation is not my main interest. I might be wrong here. -- Dr. Horst H. von Brand User #22616 counter.li.org Departamento de Informatica Fono: +56 32 654431 Universidad Tecnica Federico Santa Maria +56 32 654239 Casilla 110-V, Valparaiso, Chile Fax: +56 32 797513 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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