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Subject: Re: [boost] Request to allow contribution to Boost.Multiprecisioncpp_bin_float
From: John Maddock (john_at_[hidden])
Date: 2013-08-19 13:50:04

>I would like to contribute to the development of Boost.Multiprecision
> cpp_bin_float library. Can I work on it? If yes, then how can I start?

Hi Jyotesh,

Paul Bristow, Chris Kormanyos and I have been discussing this off-list.
There is a prototype implementation in the sandbox under the
multiprecision.cpp_bin_float directory. The current code is pretty much
complete, but under-tested. The binary-decimal and decimal-binary
conversion routines used are also brain-dead and do not round correctly (I
have a mostly working version that does this correctly on my hard drive, but
it's not quite ready for commit yet). So one of the things we need is for
folks to try this out and see what breaks (or rather to see what they can
break!). Some of the std lib function test cases in the sandbox also fail
currently as their error rates are too high. Many are also much slower than
say MPFR. Chris, would have a better idea which most need working on. And
finally, the implementation uses all integral arithmetic internally (via
cpp_int), so one big improvement we need is for someone to write Karatsuba
and FFT based multiplication routines for cpp_int (Karatsuba is probably the
higher priority). Oh and we have no docs yet.

Anything there look like something you'd like to work on?

Thanks for the interest, John.

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