NAME

       BOOM - BOOlean Minimization

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).

ASIM/LIP6                                        August 25, 2000                                         BOOM(1)