$Id$

This directory contains a set of packages that allow you to build a toy
application based on the CUDD package.

The CUDD package is a package written in C for the manipulation of
decision diagrams.  It supports binary decision diagrams (BDDs),
algebraic decision diagrams (ADDs), and Zero-Suppressed BDDs (ZDDs).

The toy application provided in this kit is called nanotrav and is a
simple-minded FSM traversal program. (See the README file and the man
page nanotrav.1 in the nanotrav directory for the details.)  It is
included so that you can run a sanity check on your installation.

INSTALLATION

Before you build the libraries and programs, you need to check the
Makefile in the top directory.  Go through the definitions contained in the
configuration section, and select the desired compiler and compilation
flags.  Instructions are provided in the comments of the Makefile.

You can always specify the options on the command line.  For instance,
on some machines you can build a "fast" version of the program by typing:

    make DDDEBUG= MTRDEBUG= ICFLAGS=-O2

The Makefile supports several targets:

    make:
	Creates a "plain" version of the program.

    make testdddmp:
	Builds a test program (testdddmp) for BDD loading from and
	storing to disk. See file README.test in the dddmp directory for
	how to run the program.

    make testobj:
	Builds a test program for the C++ interface. Requires a C++
	compiler. To run the program, run obj/testobj.

    make testcudd:
	Builds a test program for CUDD. To run the program, go to the
	cudd directory and type "./testcudd -p 2 r7x8.1.mat". The result
	can be compared to r7x7.1.out.

    make testmtr:
        Builds a test program for the mtr package.  To run the program,
	go to the mtr directory and type "./testmtr -p 1 test.groups".
    
    make clean:
	Cleans directories, but leaves libraries and programs.

    make distclean:
	Cleans thoroughly, returning the directories to their pristine
	state.

The following targets are more or less obsolete and may disappear or
change in the future.

    make check_leaks: 
	Creates a version of the program with the mnemosyne library
	linked to it. It also builds the mnemalyse program, which
	helps in finding memory leaks. This target does not work on the
	IBM RS6000. The makefile also supports purify. To use purify,
	set the PURE variable in the Makefile, and use the standard
	target.

    make optimize_dec:
	Builds a version of the program using the u-code compiler
	available on DEC machines (DECstations and Alphas). The newer
	native compiler on the Alphas does not use u-code, though.
	Therefore the standard target should be used with it.

    make lint:
	Runs lint on all subdirectories except mnemosyne. Creates lint
	libraries for all object libraries.

    make tags:
	Builds ctags-style tag files for all subdirectories except
	mnemosyne.

    make all:
	Makes all of the above, except check_leaks, which is
	incompatible with a plain "make."

All targets, except clean and distclean, will create the include
directory if it does not already exist.

The Makefile does not compile the SIS interface (cuddBddPort.c and
cuddPwPt.c found in subdirectory sis).  To compile the interface, you
also need array.h and var_set.h, which are not part of this
distribution, but come with SIS.  Detailed instructions on how to
integrate the CUDD package in SIS can be found in the documentation
(cudd/doc).

PLATFORMS

This kit has been successfully built on the following configurations:
    PC (ia32 and ia64) running Linux RedHat with gcc
    PC (ia32 and ia64) running Linux RedHat with g++
    PC (ia32) running Linux RedHat with icc
    PC (ia32) running Linux RedHat with icpc
    PC (ia64) running Linux RedHat with ecc
    PC (ia64) running Linux RedHat with ecpc
    SUN running Solaris 2.8 with cc
    SUN running Solaris 2.8 with CC
    SUN running Solaris 2.8 with gcc
    SUN running Solaris 2.8 with g++

Platforms to which I have no longer access and therefore are no longer
supported.

    DECstation running Ultrix with cc
    DECstation running Ultrix with gcc
    IBM RS6000 running AIX 3.2.4 with cc (**)
    IBM RS6000 running AIX 3.2.4 with gcc
    IBM RS6000 running AIX 3.2.4 with g++
    SUN running SunOS with gcc
    DEC Alpha running Digital Unix with cc
    DEC Alpha running Digital Unix with cxx
    DEC Alpha running Digital Unix with gcc
    HP 9000/770 running HP-UX with c89
    HP 9000/770 running HP-UX with CC
    HP 9000/770 running HP-UX with gcc
    HP 9000/770 running HP-UX with g++ (*)
    SUN running Solaris 2.8 with /usr/ucb/cc
    PC running Solaris 2.8 with /usr/bin/cc
    PC running Solaris 2.8 with /usr/ucb/cc
    PC running Solaris 2.8 with CC
    PC running Solaris 2.8 with gcc
    PC running Solaris 2.8 with g++

NOTES
    (*) C programs were compiled with g++, but linked with gcc.

    (**) Some old versions of the AIX cc compiler have buggy optimizers:
    Try compiling with -O2 instead of -O3 if the program crashes.

Running lint and compiling with gcc -Wall still produces warnings.
Running `purify' under Solaris 2.8 generates no messages.

CUDD AND WIN32

This kit has also been built on a PC running Windows98, Windows NT,
and Windows XP using the Cygnus port of the GNU tools
(http://www.cygwin.com/.)  This release of CUDD was tested under Windows
XP with versions 1.5.5-1 of the Cygwin DLL.  Both gcc and g++ were used.
The time measurement functions do not work under Windows98.  You must have
bash set up properly for make to work.  See also the instructions in Makefile.

SANITY CHECK

The directory `nanotrav' contains a very simple application based on the
CUDD package. The `nanotrav' directory contains a man page that
describes the options nanotrav supports. The files *.blif are sample
input files for nanotrav.

If you have built the mnemosyne library (make check_leaks), you can do
    cd mnemosyne
    make runmtest
This does not work on machines running SunOS, but the version of
nanotrav that uses mnemosyne may work.

DOCUMENTATION

Directory cudd-2.4.1/cudd/doc contains HTML documentation for the CUDD
package. The recommended starting point is cuddIntro.html. Documentation
in both postscript(tm) format and plain text format is also provided.
Documentation for the auxiliary libraries (except for the util library)
is in the doc subdirectories.

FEEDBACK:

Send feedback to:

Fabio Somenzi
University of Colorado at Boulder
ECE Dept.
Boulder, CO 80309-0425
Fabio@Colorado.EDU
http://vlsi.colorado.edu/~fabio