cdcExample.tcl

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###############################################################################
# Copyright (c) 2011-2024 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
#       CDC Example
#   @section
#       Analyze the Loaded Database
#   @description
#       Userware example for the ClockTree API. Do additional CDC checks.
#   @files
#       cdcExample.tcl
#   @tag
#       zdb
###############################################################################


##
# Get the database.
#
set db [gui database get]

##
# Get the top module and create a new cdc object.
#
set top [$db get_top_design]
set cdc [$db cdc new $top -skipundriven]

##
# Print the clock tree result.
#
foreach domainIdx [$cdc getDomainList -incr] {
    set clkPins [$cdc getClkPinList $domainIdx]
    puts "CLK-SRC: [$cdc getSrc $domainIdx] => [llength $clkPins]"
}

##
# Calculate and print domain crossing result.
#
set i 0
$cdc calcDomainCross
foreach domainCrossIdx [$cdc getDomainCrossList -incr] {
    set count [llength [$cdc getDomainCrossTrgList $domainCrossIdx]]
    set pair [$cdc getDomainCrossDomainPair $domainCrossIdx]
    set src    "\{[$cdc getSrc [lindex $pair 0]]\} "
    append src "\{[$cdc getSrc [lindex $pair 1]]\}"
    puts "trns. [incr i] ($count FFs) $src"
}

##
# Free the cdc object.
#
$cdc free