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Date: -- (:)
From: Pietro Abate <Pietro.Abate@p...>
Subject: BDD reloaded
Hi all,

I've done my homework and I've collected few links about bdd
libraries. I still have few questions: 

+ Is there a native (and efficient) ocaml BDD implementation ? In
  particular, as pointed out on this mailing list, with variable ordering
  and other possible optimizations that can be compared in speed with
  buddy/cudd (c/c++).

= From what I can see, the answer is no. A lot of toy implementations
  though...

+ Do you know if there is an ocaml binding for buddy ? 

= I guess no, but I hope I'm wrong...

+ Does anybody have experience with the bindings done at inrialpes to
  CUDD ? Is this project still actively maintained / used ? How does it
  compare efficiency-wise with other bdd libraries ?

+ If I was to start writing my ocaml bindings, which c/c++ library would
  you advice ? Buddy seems widely used, but I wasn't able to find any
  hard evidence that it is the best bdd library available... Do you know 
  of any paper surveying different bdd implementations ?

thanks :)
p

----------------------------- My links for reference ----------------

Please add to the list if you know of other libraries that I forgot to
mention. This might end up to be a FAQ...

==Ocaml libraries (bindings and native in no particular order) :==

* Jean-Christophe Filliâtre (ocaml implementation)
http://www.lri.fr/~filliatr/ftp/publis/hash-consing2.ps.gz Paper
http://www.lri.fr/~filliatr/ftp/ocaml/bdd/ Code

* bindings to the CUDD BDD library
http://www.inrialpes.fr/pop-art/people/bjeannet/mlxxxidl-forge/ Code

* Olivier Michel (ocaml implementation)
http://www.ibisc.univ-evry.fr/~michel/BDD/ Code

* Xavier Leroy (part of an experimental sat solver) 
https://gforge.inria.fr/plugins/scmsvn/viewcvs.php/attic/xlsat/?root=sodiac Code

* John Harrison
http://www.cl.cam.ac.uk/~jrh13/atp/OCaml/bdd.ml Code

* Ocaml implementation (who is the author ?)
http://oops.tepkom.ru/projects/ocamlbdd/ Wiki

==C/C++ Libraries==

* http://buddy.wiki.sourceforge.net/ Buddy

* http://vlsicad.eecs.umich.edu/BK/Slots/cache/www.itu.dk/research/buddy/index.html Old version of Buddy 

* http://vlsi.colorado.edu/~fabio/CUDD/cuddIntro.html CUDD

* many other cited in the wikipedia link on bdds


==Relevant Mailing list Messages==

The ocaml ml has several references to BDDs. These are 3 interesting threads
that I've used as a starting point for my research. 

In this thread
http://caml.inria.fr/pub/ml-archives/caml-list/2000/01/405b651014b09c51c691aab72d69166a.en.html
there is mention of a possible binding for Jørn Lind-Nielsen's BDD
library BuDDy. I'm wondering if this binding was ever released.

In this thread
http://groups.google.com/group/fa.caml/browse_frm/thread/4af5391f52279e38/550b7df324ae1900#550b7df324ae1900
Alain Frish points out that none of existing ocaml libraries implements
automatic reordering of variables... And I don't know if the state of affairs
is changed at this regard.

In this thread
http://caml.inria.fr/pub/ml-archives/caml-list/2001/04/8bbf7629ef3ef299c16f78bd2b986e36.en.html
David Mentre announces a preliminary work on binding for the cudd
library, but the link is broken... this link currently is broken:
http://www-rocq.inria.fr/~mentre/software/ocaml-bdd/ 
and there is a mention to a caml-light implementation of a robdd library
that I was also not able to retrieve.