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Re: [INFO] Yet Another sqrt algorithm.


From: Torbjorn Granlund
Subject: Re: [INFO] Yet Another sqrt algorithm.
Date: 12 Dec 2001 16:11:20 +0100
User-agent: Gnus/5.0807 (Gnus v5.8.7) Emacs/20.7

address@hidden (Paul Zimmermann) writes:

     The current release is GMP 4.0.  Please download
     <ftp://ftp.gnu.org/gnu/gmp/gmp-4.0.tar.gz>. The algorithm
     used currently was developed by Paul Zimmermann.  I don't
     know if you code could improve some part of that algorithm,
     since my understanding of the algorithm is limited.
  
     Paul, what do you think?
  
  It could improve the one-limb code, which currently uses a 8-bit
  table approximation, together with 2 or 3 Newton's loops, depending
  on the word size. See function mpn_sqrtrem1 in mpn/sqrtrem.c from GMP 4.0.
  
Want to work on improving the gmp/mpn/generic/sqrtrem.c
basecase code?  The proposed code could perhaps be faster
for up to a small number of limbs.  The current basecase is
just for a single limb.

-- 
Torbjörn



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