extractCone.tcl

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###############################################################################
# Copyright (c) 2005-2024 by Altair Engineering, Inc.
# All rights reserved.
#
# Altair Engineering, Inc. makes this software available as part of the Vision
# tool platform.  As long as you are a licensee of the Vision tool platform
# you may make copies of the software and modify it to be used within the
# Vision tool platform, but you must include all of this notice on any copy.
# Redistribution without written permission to any third party, with or
# without modification, is not permitted.
# Altair Engineering, Inc. does not warrant that this software is error free
# or fit for any purpose.  Altair Engineering, Inc. disclaims any liability for
# all claims, expenses, losses, damages and costs any user may incur as a
# result of using, copying or modifying the software.
# =============================================================================
#   @userware
#       Cone Extraction Example
#   @section
#       Miscellaneous Userware Examples
#   @description
#       API example how to use the Cone extraction API: extract the logic cone
#       or path between a start node and several targets.
#   @test
#       ModuleTest
#   @files
#       extractCone.tcl
#   @example
#       demo/rtl/aquarius/aquarius.f
#   @cmdline
#       -F @example[0]
#       -userware @files[0]
#   @tag
#       zdb gui
###############################################################################


# =============================================================================
# ExtractCone - Cone Extraction Userware example: this Userware can be used to
#               extract the logic cone or paths between a start node and
#               several targets.
#
#               e.g. start GateVision with the following command line options:
#               gatevisionpro -userware ../demo/api/cone/extractCone.tcl \
#                                                   -F ../demo/verilog/bus85.f
#               The design bus85.f is read into the GateVision database, then
#               the cone.tcl userware is executed.
#               Please refer to doc/api/cone.html for all options.
# =============================================================================
#
proc ExtractCone {db} {
    ##
    # Return if the database is empty.
    #
    if {$db == {}} {
        return
    }

    ##
    # Loop over all top modules
    #
    $db foreach top top {
        ##
        # Loop over all ports of this module
        #
        $db foreach port $top port {
            ##
            # Skip all ports which are not input
            #
            if {[$db directionOf $port] != "input"} {
                continue
            }

            ##
            # Extract the cone to all DFF cells.
            #
            set oidList [$db cone -out -targetCell "DFF" $port]

            ##
            # Load the result into the Cone Window.
            #
            gui cone load $oidList
            update idletasks

            ##
            # Show the Cone Window.
            #
            gui window show "Cone"

            ##
            # Zoom the Cone window to fullfit
            #
            gui cone zoom fullfit

            ##
            # Save Cone as Verilog
            #
            gui cone saveAs Verilog "cone.v"
        }
    }
}


##
# Use gui database runOrRegisterChangedCallback to immediately run
# ExtractCone
# if we have a database, or otherwise register the proc to be executed after
# the database is available.
#
gui database runOrRegisterChangedCallback ExtractCone