🚀 go-pugleaf

In article <1992Dec7.034240.27779@trl.oz.au>, peter@gort.trl.OZ.AU (Peter K. Campbell) writes:
|> Hello out there.  We have a C program here which the profiler tells us
|> is making extensive use of exp & log functions.  Seeing as it takes
|> several days to run on a Sun Sparcstation & several hours on a Cray
|> Y-MP, we are looking for a quicker implementation of the general
|> exp/log algorithm than cc or gcc provides.
|> 
|> So, would anyone out there know of any C implementation of a fast,
|> general purpose exp/log (e.g. table lookup with a few iterations for
|> fine tuning), available publicly or in a book?  Or perhaps a
|> description of a general algorithm that I can implement in C without
|> too many problems?
|> 
|> Thanks in advance.
|> 
|> Peter K. Campbell
|> p.campbell@trl.oz.au

Take a look at "Table-Driven implementation of the exponential function for
IEEE floating-point arithmetic", Ping Tak Peter Tang, ACM Trans. Math. Softw.,
Vol. 15, No. 2 ( June 1989) pp144-157.

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