Re: using linux instead of osf

Scott Manley (spm@star.arm.ac.uk)
Tue, 26 Nov 1996 16:45:45 +0000

Well I think the GNU libm is so primitive that it must be updated, there's no
single precision version of many of the functions so you always work in double
precision whether you need it or not. I'd be quite interested in looking at
the source to see if larger lookup tables would significantly help matters,
given that I do a lot of work with the maths libraries I'd really benefit from
extra efficiency.

Of course the real problem is that bringing gnu libm up to the same
performance as the DEC version might attract the attention of DEC's lawyers,
i.e. anyone who has ever used DEC's maths libraries cannot reverse engineer
them without breaking the DEC license. Even if they just linked their code
against the libs they would still be in a position where they would be liable
to prosecution.

Or is that me just being paranoid?

> Yes. The real issue here is the extraordinary efficiency
> of some of the DEC optimized libraries that can more than
> double the speed of some code.

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