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 [email protected]
"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce
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