parasitic/lump.tcl

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###############################################################################
# Copyright (c) 2017-2024 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.
# =============================================================================
#   @plugin
#       Lump RC Modules
#   @namespace
#       Lump
#   @section
#       Modify the Loaded Database
#   @description
#       Merges parallel and serial transistors and resistors of parasitic
#       networks.
#   @license
#       permit spice
#   @files
#       parasitic/lump.tcl
#   @example
#       demo/spef/usb_phy.spef
#   @cmdline
#       -readspef @example[0]
#       -userware @files[0]
#   @tag
#       gui parasitic spf dspf
###############################################################################


# =============================================================================
# Init - Initialize the plugin.
# =============================================================================
#
proc Lump:Init {} {
    gui menu command {"Userware" "Lump Parasitics"} [list Lump:Run]
}


# =============================================================================
# Finit - Finalize the plugin.
# =============================================================================
#
proc Lump:Finit {} {
    gui menu removeEntry {"Userware" "Lump Parasitics"}
}


# -----------------------------------------------------------------------------
# _parasiticModule - Call device merge operators in a loop until the instance
#                    count does not change anymore.
# -----------------------------------------------------------------------------
#
proc Lump:_parasiticModule {db para} {
    set loop 0
    set cnt [Lump:_countInst $db $para]
    while {true} {
        $db oper mergeSerialRes   $para
        $db oper mergeParallelRes $para
        $db oper mergeSerialCap   $para
        $db oper mergeParallelCap $para
        set newCnt [Lump:_countInst $db $para]
        if {$newCnt == $cnt} {
            break
        } else {
            incr loop
            set cnt $newCnt
        }
    }
    if {$loop > 0} {
        $db deleteZombies
        return true
    }
    return false
}


# =============================================================================
# Run - Loop over all parasitic modules and call Lump:_parasiticModule.
# =============================================================================
#
proc Lump:Run {} {
    set db [gui database get]

    if {$db == {}} {
        return
    }

    $db foreach parasitic para {
        Lump:_parasiticModule $db $para
    }
    gui database modified
}


# -----------------------------------------------------------------------------
# _countInst - Count the number of non-zombie instances in the given module.
# -----------------------------------------------------------------------------
#
proc Lump:_countInst {db mod} {
    set cnt 0
    $db foreach inst $mod inst {
        if {[$db flag $inst is zombie]} {
            continue
        }
        incr cnt
    }
    return $cnt
}


# =============================================================================
# Call the initialization procedure.
# =============================================================================
#
Lump:Init