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273 | ###############################################################################
# Copyright (c) 2019-2024 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
# Path to Input
# @namespace
# PathToInput
# @section
# Miscellaneous Userware Examples
# @description
# Use the Cone Extraction API to find a path from a given start pin or
# node to primary input.
# If a cell contains only transistors then this cell is treated as a
# leaf cell, because the Cone Extraction cannot trace through
# transistors.
# @configuration
# @files
# pathToInput.tcl
# @example
# demo/rtl/aquarius/aquarius.f
# @cmdline
# -F @example[0]
# -userware @files[0]
# @tag
# zdb gui
###############################################################################
# =============================================================================
# Init - Initialize the plugin.
# =============================================================================
#
proc PathToInput:Init {} {
##
# Customize the Popup Menu.
#
gui popup append "Show Path to Input" [list PathToInput:Show]
##
# Add the option to configure the number of displayed paths.
#
gui plugin addConfig PathToInput numberOfPaths 1 number "Number of Paths"
##
# Register a callback to fill a folded leafcell module.
#
gui cone customUnfoldAction [list PathToInput:_fillFoldedModule]
##
# Register PathToInput:_identifyLeafCells to be run on database changes
# and immediately if there's already is a database.
#
gui database runAndRegisterChangedCallback \
[list PathToInput:_identifyLeafCells]
}
# =============================================================================
# Finit - Finalize the plugin.
# This procedure is automatically called when deactivating the plugin.
# =============================================================================
#
proc PathToInput:Finit {} {
##
# Clear all defined arcs.
#
zdb cone cleararc
##
# Undo modifications of the GUI.
#
gui popup remove "Show Path to Input"
##
# Remove the callback registration.
#
gui database removeChangedCallback "PathToInput:_identifyLeafCells"
}
# =============================================================================
# Show -
# =============================================================================
#
proc PathToInput:Show {oidList} {
##
# Get the database and return if the database is empty.
#
set db [gui database get]
if {($db == {}) || ($oidList == {})} {
return
}
##
# Get the configuration option with the number of paths to calculate.
#
set numberOfPaths [gui plugin getConfigValue PathToInput numberOfPaths]
##
# Run the Cone Extraction to get the requested number of paths from the
# given start object.
#
set res [$db cone \
-in \
-checkArcs \
-targetIO \
-paths \
-pathLimit $numberOfPaths \
-excludeFlaggedNet power \
-excludeFlaggedNet ground \
-excludeFlaggedNet negpower \
[lindex $oidList 0]]
##
# Process the result list.
#
set flaggedModules {}
set foldList {}
set oidList {}
foreach path $res {
foreach oid [lrange $path 1 end] {
##
# Add every result object to the oidList to be loaded later into
# the Cone window.
#
lappend oidList $oid
##
# If this result object is a pin of a hierarchical instance flagged
# as a leaf cell then add this module to the list of folded modules.
#
if {([$db oid type $oid] eq "pin") && [$db isModule $oid]} {
set inst [$db oid convertTo inst $oid]
set module [$db oid convertTo module $inst]
if {[$db flag $module is leafcell]} {
lappend flaggedModules $module
lappend foldList $inst
}
}
}
}
##
# Add one object per folded module to trigger the visibility of the
# fold/unfold button.
#
foreach module [lsort -unique $flaggedModules] {
$db foreach inst $module inst {
lappend oidList $inst
break
}
}
##
# Activate the Cone window.
#
gui window show Cone
##
# Load all results into the Cone window.
#
gui cone load $oidList
##
# Fold all leaf cells in the result.
#
gui cone fold $foldList
}
# -----------------------------------------------------------------------------
# _defineConeArcs - Define cone arcs for the given module.
# -----------------------------------------------------------------------------
#
proc PathToInput:_defineConeArcs {db module} {
##
# Create a list of input and output ports at the given module.
#
set inputPortList {}
set outputPortList {}
$db foreach port $module port {
if {[$db directionOf $port] eq "input"} {
lappend inputPortList [$db oid oname $port]
} else {
lappend outputPortList [$db oid oname $port]
}
}
##
# Flag this module as a leaf cell.
#
$db flag $module set leafcell
##
# Define cone arcs from every output port to all input ports.
#
foreach enterPort $outputPortList {
zdb cone definearc [$db oid oname $module] $enterPort $inputPortList
}
}
# -----------------------------------------------------------------------------
# _identifyLeafCells - Loop over all modules in the design and identify
# modules that contain only transistors to flag and
# define cone arcs.
# -----------------------------------------------------------------------------
#
proc PathToInput:_identifyLeafCells {db} {
if {$db == {}} {
return
}
##
# Clear all user-defined arcs.
#
zdb cone cleararc
$db foreach module module {
set isLeafCell true
$db foreach inst $module inst {
if {[$db isModule $inst]} {
set isLeafCell false
break
}
}
if {$isLeafCell} {
PathToInput:_defineConeArcs $db $module
}
}
}
# -----------------------------------------------------------------------------
# _fillFoldedModule - Fill a folded leafcell module.
# -----------------------------------------------------------------------------
#
proc PathToInput:_fillFoldedModule {inst} {
set db [gui database get]
set module [$db moduleOf $inst]
if {[$db flag $module is leafcell]} {
set pinList {}
$db foreach net $module net {
$db foreach pin $net pin {
if {![$db flag $pin is hide]} {
lappend pinList $pin
}
}
}
gui cone append $pinList
}
gui cone unfold [list $inst]
}
# =============================================================================
# Call the initialization procedure.
# =============================================================================
#
PathToInput:Init
|