## Re: using linux instead of osf

**Michal Jaegermann** (*michal@ellpspace.math.ualberta.ca*)

*Tue, 26 Nov 1996 19:58:29 -0700 (MST)*

*> *

*> > David Mosberger-Tang wrote:*

*> *

*> > [ Answering the following: ]*

*> *

*> > Naively, one would expect that, to compute the sine of some *

*> > argument in single precision would require *less* fp operations than *

*> > to get it correct up to double precision.*

*> *

*> You have a good point here.*

....

*> The algorithm per se is the same. I don't*

*> recall off-hand how many bits of precisions you get with each step in*

*> a Taylor series, but it seems to me that you should be able to save*

*> one or two steps when using single-precision.*

Ugh! I do hope that these routines do not use Taylor expansions

to compute elementary functions. If yes, then no wonder that DEC

library is so much faster. I do not have right now neither hardware

nor sources, but in general Taylor expansions converge very slowly.

There are better ways to compute such things.

Michal

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