BOOM(1) CAO-VLSI Reference Manual BOOM(1) 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 behav- ioural description and must be written in vbe(5) format. The resulting be- havioural optimized description is saved with the name outname or in- put_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 information are displayed on the stan- dard 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 sig- nals. This mode is well-suited for big or regular circuits such as multipliers, adders. By default BOOM performs a global opti- mization and removes most of the intermediate signals so that the outputs are expressed in terms of the inputs or the internal reg- isters. This mode is well-suited for random circuits such as FSMs. -P Uses a parameter file input_name.boom describing optimization di- rectives 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 chosen 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 opti- mization. SEE ALSO boom(5), vbe(5), asimut(1), boog(1), MBK_WORK_LIB(1). ASIM/LIP6 August 25, 2000 BOOM(1)
NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT VARIABLES | OPTIONS | SEE ALSO
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