Messages in this thread | | | Date | Fri, 31 Mar 2006 22:05:42 +1100 | From | Peter Williams <> | Subject | Re: Float numbers in module programming |
| |
Olivier Galibert wrote: > On Thu, Mar 30, 2006 at 01:46:20PM -0500, linux-os (Dick Johnson) wrote: >> Yeah. The correct word was irrational, which is its definition. The >> point was that one can do a lot of very accurate work on real numbers >> without using the FP unit and the decimal system. > > As long as you don't use sin/cos (oops, no 3D, no polar coordinates, > no FFT), sqrt (oops no lenghts), pi (oops no non-polygonal surfaces) > or ln/exp (oops, a lot of things are gone there). > > Working with rationals is not that realistic nowadays except in things > like mathematica, maple and friends. Fixed-point though is still very > realistics, it's just a different precision/scale tradeoff than fp, > and one you control.
Fixed point is a special case of rational i.e. with a fixed denominator.
Peter -- Peter Williams pwil3058@bigpond.net.au
"Learning, n. The kind of ignorance distinguishing the studious." -- Ambrose Bierce - 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/
| |