Hi
On 7/30/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
(Sorry for the repost: I needed to correct a few typos--thanks
Seth--and clarify a few things.)
GHC Task Ticket # 601 suggests replacing GMP with OpenSSL's Bignum library, BN.
I have two questions concerning this:
(1) Why not use the ARbitrary PRECision Computation Package (ARPREC)
by David Bailey, Yozo Hida, Karthik Jeyabalan, Xiaoye Li and Brandon
Thompson? Here is a reference web page:
http://crd.lbl.gov/~dhbailey/mpdist/
ARPREC is written in C++ but supports calls from C (see
include/arprec/c_mp.h in the distribution directory). ARPREC is very
fast and supports more complex mathematics than BN. The Licensing for
ARPREC is not a problem: essentially similar to BSD3.
I think the idea is to get rid of annoying dependencies (GMP), and not to
create new ones (C++). There's few other big ifs with APREC as far as I
see: Fiddling with FPU precision regs in x86 and possibly problems in
Windows environment. It might require a bit fiddling to get memory
handling right when using APREC, as well.
In past, I tried to get rid of GMP by replacing it with libtommath
http://math.libtomcrypt.com/
But I have given up for now - because of related and unrelated problems.
But, whoever starts the work probably gets to pick their lib, so OpenSSL's
BN, APREC, LibTomMath or anything else...it's open :-)
Best regards,
Esa
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