boom

BOOM(1)                    CAO-VLSI Reference Manual                   BOOM(1)



NAME
       BOOM - BOOlean Minimization


ORIGIN
       This software belongs to the  ALLIANCE CAD SYSTEM developed by the ASIM
       team at LIP6 laboratory of Université Pierre et Marie CURIE, in Paris,
       France.

       Web : http://asim.lip6.fr/recherche/alliance/
       E-mail : alliance-users@asim.lip6.fr


SYNOPSIS
       boom [-VTOAP] [-l num] [-d num] [-i num] [-a num] [-sjbgpwtmorn]
                      filename [outname]

DESCRIPTION
       BOOM is used for the first step of the synthesis process.  It optimizes
       a behavioural description using a Reduced Ordered Binary Decision
       Diagram representation of logic functions.  The file filename is the
       input behavioural description and must be written in vbe(5) format.
       The resulting behavioural optimized description is saved with the name
       outname or input_name_o in vbe(5) format.


ENVIRONMENT VARIABLES
       MBK_WORK_LIB(1)
                 indicates the path to the read/write directory for the
                 session.


OPTIONS
       -V        Verbose mode on.  Each step of the optimization is displayed
                 on the standard output.

       -T        Trace mode on.  Some debug informations are displayed on the
                 standard output.

       -O        Reverses initial Bdd variables order.

       -A        BOOM performs a local optimization and keeps the architecture
                 of the initial description by saving most of the intermediate
                 signals.  This mode is well-suited for big or regular
                 circuits such as multipliers, adders.  By default BOOM
                 performs a global optimization and removes most of the
                 intermediate signals so that the outputs are expressed in
                 terms of the inputs or the internal registers.  This mode is
                 well-suited for random circuits such as FSMs.

       -P        Uses a parameter file input_name.boom describing optimization
                 directives and constraints.  (see below for the exact syntax)

                 # Example of .boom file

                 #
                 # The list of auxiliary signals that have to be kept
                 # during optimization.
                 # Generally carry signals, ram address signals etc ...
                 #
                 BEGIN_KEEP

                 carry[3:0]
                 ram_address[3:0]

                 END

                 #
                 # The list of auxiliary signals which assigned
                 # expression won't be modified.
                 # Generally it's ram output signals.
                 #
                 BEGIN_DONT_TOUCH
                 ram_out[7:0]
                 END


       -l num    Specifies the optimization level [0-3] (default is 0, low
                 level).

       -d num    Specifies the delay optimization percent (default is 0%
                 delay, 100% surface).

       -i num    Specifies the number of iterations for the choosen
                 optimization algorithm (for experts only).

       -a num    Specifies the amplitude during bdd reordering (for experts
                 only).

       -sjbgpwtmorn
                 Specifies which algorithm has to be used for the boolean
                 optimization.


SEE ALSO
       boom(5), vbe(5), asimut(1), boog(1), MBK_WORK_LIB(1).



BUG REPORT
       This tool is under development at the ASIM department of the LIP6
       laboratory.
       We need your feedback to improve documentation and tools.






ASIM/LIP6                       August 25, 2000                        BOOM(1)