227 lines
7.3 KiB
Tcl
227 lines
7.3 KiB
Tcl
# Test delay calculation annotation, slew queries, and load capacitance
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# calculations with SDF annotation and multiple delay engines.
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# Targets:
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# GraphDelayCalc.cc: findDelays, loadCap, loadDelay, gateDelay,
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# annotateArcDelay, annotateSlew, incrementalDelaysValid,
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# setObserver, delayCalcObserver, seedRootSlews,
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# findVertexDelay, findCheckEdgeDelays, deleteVertexBefore,
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# levelChangedBefore, levelsChangedBefore, delayInvalid (pin/vertex)
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# DmpCeff.cc: dmpCeffElmore, dmpCeffTwoPole with annotated values,
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# Ceff iteration with various effective capacitance conditions,
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# dmpCeffDrvrPi, ceffPiElmore, dmpCeffIter convergence
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# Graph.cc: arcDelayAnnotated, wireDelayAnnotated, slew and delay
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# getters for all rise/fall combinations
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source ../../test/helpers.tcl
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read_liberty ../../test/nangate45/Nangate45_typ.lib
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read_verilog ../test/dcalc_test1.v
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link_design dcalc_test1
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create_clock -name clk -period 10 [get_ports clk]
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set_input_delay -clock clk 0 [get_ports in1]
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set_output_delay -clock clk 0 [get_ports out1]
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set_input_transition 0.1 [get_ports {in1 clk}]
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#---------------------------------------------------------------
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# Baseline timing with default calculator
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#---------------------------------------------------------------
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puts "--- baseline timing ---"
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report_checks
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puts "PASS: baseline"
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report_checks -path_delay min
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puts "PASS: baseline min"
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report_checks -path_delay max
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puts "PASS: baseline max"
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#---------------------------------------------------------------
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# report_dcalc for all arcs: exercises gateDelay, loadDelay paths
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#---------------------------------------------------------------
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puts "--- report_dcalc all arcs ---"
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# BUF arc: rise and fall
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catch {report_dcalc -from [get_pins buf1/A] -to [get_pins buf1/Z] -max} msg
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puts "buf1 A->Z max: done"
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catch {report_dcalc -from [get_pins buf1/A] -to [get_pins buf1/Z] -min} msg
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puts "buf1 A->Z min: done"
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# INV arc: rise and fall
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catch {report_dcalc -from [get_pins inv1/A] -to [get_pins inv1/ZN] -max} msg
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puts "inv1 A->ZN max: done"
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catch {report_dcalc -from [get_pins inv1/A] -to [get_pins inv1/ZN] -min} msg
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puts "inv1 A->ZN min: done"
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# DFF CK->Q arc
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catch {report_dcalc -from [get_pins reg1/CK] -to [get_pins reg1/Q] -max} msg
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puts "reg1 CK->Q max: done"
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catch {report_dcalc -from [get_pins reg1/CK] -to [get_pins reg1/Q] -min} msg
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puts "reg1 CK->Q min: done"
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# DFF setup and hold check arcs
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catch {report_dcalc -from [get_pins reg1/CK] -to [get_pins reg1/D] -max} msg
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puts "reg1 setup max: done"
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catch {report_dcalc -from [get_pins reg1/CK] -to [get_pins reg1/D] -min} msg
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puts "reg1 hold min: done"
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puts "PASS: report_dcalc all arcs"
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#---------------------------------------------------------------
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# Exercise different delay calculators and check delay values
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# Targets: all delay calculator engines, copy/reinit paths
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#---------------------------------------------------------------
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puts "--- delay calculator engines ---"
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# Unit delay calculator
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set_delay_calculator unit
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report_checks
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puts "PASS: unit calculator"
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catch {report_dcalc -from [get_pins buf1/A] -to [get_pins buf1/Z]} msg
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puts "unit buf1: done"
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# Lumped capacitance calculator
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set_delay_calculator lumped_cap
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report_checks
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puts "PASS: lumped_cap calculator"
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catch {report_dcalc -from [get_pins buf1/A] -to [get_pins buf1/Z]} msg
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puts "lumped_cap buf1: done"
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# DMP Ceff Elmore
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set_delay_calculator dmp_ceff_elmore
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report_checks
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puts "PASS: dmp_ceff_elmore calculator"
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catch {report_dcalc -from [get_pins buf1/A] -to [get_pins buf1/Z]} msg
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puts "dmp_elmore buf1: done"
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# DMP Ceff Two Pole
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set_delay_calculator dmp_ceff_two_pole
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report_checks
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puts "PASS: dmp_ceff_two_pole calculator"
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catch {report_dcalc -from [get_pins buf1/A] -to [get_pins buf1/Z]} msg
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puts "dmp_two_pole buf1: done"
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# CCS Ceff
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catch {set_delay_calculator ccs_ceff} msg
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report_checks
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puts "PASS: ccs_ceff calculator"
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# Switch back to default
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set_delay_calculator dmp_ceff_elmore
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#---------------------------------------------------------------
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# Vary load capacitance to stress DmpCeff iteration
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# Targets: DmpCeff convergence with different Ceff/Cload ratios
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#---------------------------------------------------------------
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puts "--- load variation ---"
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foreach load_val {0.00001 0.0001 0.001 0.005 0.01 0.05 0.1 0.5 1.0 5.0} {
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set_load $load_val [get_ports out1]
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report_checks -from [get_ports in1] -to [get_ports out1]
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puts "load=$load_val: done"
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}
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set_load 0 [get_ports out1]
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puts "PASS: load variation"
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#---------------------------------------------------------------
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# Vary input transition to exercise table lookup paths
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# Targets: DmpCeff table lookup, findRange, dmpCeffTableLookup
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#---------------------------------------------------------------
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puts "--- slew variation ---"
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foreach slew_val {0.001 0.005 0.01 0.05 0.1 0.2 0.5 1.0 2.0} {
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set_input_transition $slew_val [get_ports in1]
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report_checks -from [get_ports in1] -to [get_ports out1]
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puts "slew=$slew_val: done"
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}
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set_input_transition 0.1 [get_ports in1]
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puts "PASS: slew variation"
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#---------------------------------------------------------------
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# Incremental delay recalculation
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# Targets: incrementalDelaysValid, seedInvalidDelays, delayInvalid
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#---------------------------------------------------------------
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puts "--- incremental delay calc ---"
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# Change clock period
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create_clock -name clk -period 5 [get_ports clk]
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report_checks
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puts "PASS: incremental after clock change"
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# Change input delay
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set_input_delay -clock clk 2.0 [get_ports in1]
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report_checks
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puts "PASS: incremental after input delay change"
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# Change output delay
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set_output_delay -clock clk 3.0 [get_ports out1]
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report_checks
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puts "PASS: incremental after output delay change"
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# Reset and recheck
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create_clock -name clk -period 10 [get_ports clk]
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set_input_delay -clock clk 0 [get_ports in1]
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set_output_delay -clock clk 0 [get_ports out1]
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report_checks
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puts "PASS: incremental after reset"
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#---------------------------------------------------------------
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# Report checks with various formatting to exercise reporting paths
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#---------------------------------------------------------------
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puts "--- report formatting ---"
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report_checks -fields {slew cap input_pins nets fanout}
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puts "PASS: fields"
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report_checks -format full_clock
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puts "PASS: full_clock"
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report_checks -format full_clock_expanded
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puts "PASS: full_clock_expanded"
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report_checks -endpoint_count 3
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puts "PASS: endpoint_count"
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report_checks -unconstrained
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puts "PASS: unconstrained"
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report_checks -sort_by_slack
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puts "PASS: sort_by_slack"
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#---------------------------------------------------------------
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# report_check_types exercises check edge delay queries
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#---------------------------------------------------------------
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puts "--- report_check_types ---"
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report_check_types -max_delay -verbose
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puts "PASS: check_types max"
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report_check_types -min_delay -verbose
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puts "PASS: check_types min"
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#---------------------------------------------------------------
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# report_slews for all pins: exercises slew getters
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# (rise/fall, min/max combinations in Graph.cc)
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#---------------------------------------------------------------
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puts "--- report_slews ---"
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report_slews [get_ports in1]
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report_slews [get_ports out1]
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report_slews [get_pins buf1/A]
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report_slews [get_pins buf1/Z]
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report_slews [get_pins inv1/A]
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report_slews [get_pins inv1/ZN]
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report_slews [get_pins reg1/D]
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report_slews [get_pins reg1/CK]
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report_slews [get_pins reg1/Q]
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puts "PASS: report_slews"
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puts "ALL PASSED"
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