bfloat; arbitrary precision floating point arithmetic; speed relative to GMP,gmpy
Subject: bfloat; arbitrary precision floating point arithmetic; speed relative to GMP,gmpy
From: Raymond Toy
Date: Sat, 25 Aug 2007 13:12:17 -0400
Richard Fateman wrote:
> There is also a package for qd or quad double which extends the fraction
> (4X longer than double),
> But this has the restriction that you seem to expect on exponent.
>
> The code for all this is posted on the internet, except you'd have to get
> your own copy of Allegro.
>
You can also try oct (http://common-lisp.net/project/oct) for a portable
Lisp implementation of quad-double. It is reasonably fast, but I
suspect it is slower than an FFI interface to qd.
Ray