254 lines
8.9 KiB
Tcl
254 lines
8.9 KiB
Tcl
# Test exception paths: set_false_path, set_multicycle_path, set_max_delay,
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# set_min_delay, set_data_check, and their effects on timing.
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# Targets: Sta.cc makeFalsePath, makeMulticyclePath, makePathDelay,
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# resetPath, makeGroupPath, isGroupPathName, isPathGroupName,
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# pathGroupNames, makeExceptionFrom/To/Thru,
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# Search.cc arrivalsInvalid, endpointsInvalid,
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# PathEnd.cc PathEndPathDelay, PathEndCheck (multicycle),
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# VisitPathEnds.cc visitPathEnds with exceptions,
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# PathGroup.cc makeGroupPathEnds with exception paths
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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 search_path_end_types.v
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link_design search_path_end_types
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create_clock -name clk -period 10 [get_ports clk]
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set_input_delay -clock clk 1.0 [get_ports in1]
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set_input_delay -clock clk 1.0 [get_ports in2]
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set_input_delay -clock clk 0.5 [get_ports rst]
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set_output_delay -clock clk 2.0 [get_ports out1]
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set_output_delay -clock clk 2.0 [get_ports out2]
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set_output_delay -clock clk 2.0 [get_ports out3]
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# Baseline timing
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report_checks -path_delay max > /dev/null
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############################################################
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# set_false_path from input to register
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############################################################
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puts "--- set_false_path -from port -to pin ---"
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set_false_path -from [get_ports in1] -to [get_pins reg1/D]
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report_checks -path_delay max -from [get_ports in1]
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puts "--- remove false path ---"
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unset_path_exceptions -from [get_ports in1] -to [get_pins reg1/D]
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report_checks -path_delay max -from [get_ports in1]
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############################################################
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# set_false_path -through
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############################################################
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puts "--- set_false_path -through ---"
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set_false_path -through [get_pins buf1/Z]
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report_checks -path_delay max
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puts "--- remove false_path through ---"
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unset_path_exceptions -through [get_pins buf1/Z]
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report_checks -path_delay max
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############################################################
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# set_false_path -setup / -hold
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############################################################
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puts "--- set_false_path -setup ---"
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set_false_path -setup -from [get_ports in2] -to [get_pins reg1/D]
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report_checks -path_delay max
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puts "--- remove false_path setup ---"
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unset_path_exceptions -setup -from [get_ports in2] -to [get_pins reg1/D]
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puts "--- set_false_path -hold ---"
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set_false_path -hold -from [get_ports in2] -to [get_pins reg1/D]
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report_checks -path_delay min
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puts "--- remove false_path hold ---"
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unset_path_exceptions -hold -from [get_ports in2] -to [get_pins reg1/D]
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############################################################
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# set_multicycle_path setup and hold
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############################################################
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puts "--- set_multicycle_path 2 -setup ---"
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set_multicycle_path 2 -setup -from [get_ports in1] -to [get_pins reg1/D]
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report_checks -path_delay max -from [get_ports in1] -to [get_pins reg1/D]
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puts "--- set_multicycle_path 1 -hold ---"
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set_multicycle_path 1 -hold -from [get_ports in1] -to [get_pins reg1/D]
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report_checks -path_delay min -from [get_ports in1] -to [get_pins reg1/D]
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puts "--- set_multicycle_path 3 -setup with -through ---"
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unset_path_exceptions -setup -from [get_ports in1] -to [get_pins reg1/D]
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unset_path_exceptions -hold -from [get_ports in1] -to [get_pins reg1/D]
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set_multicycle_path 3 -setup -through [get_pins and1/ZN]
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report_checks -path_delay max -through [get_pins and1/ZN]
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puts "--- remove multicycle through ---"
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unset_path_exceptions -setup -through [get_pins and1/ZN]
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############################################################
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# set_max_delay / set_min_delay (PathDelay)
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############################################################
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puts "--- set_max_delay ---"
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set_max_delay 5 -from [get_ports in1] -to [get_pins reg1/D]
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report_checks -path_delay max -from [get_ports in1] -to [get_pins reg1/D]
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puts "--- set_min_delay ---"
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set_min_delay 0.1 -from [get_ports in1] -to [get_pins reg1/D]
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report_checks -path_delay min -from [get_ports in1] -to [get_pins reg1/D]
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puts "--- remove max/min delay ---"
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unset_path_exceptions -from [get_ports in1] -to [get_pins reg1/D]
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report_checks -path_delay max
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############################################################
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# set_max_delay -through (exercises PathEndPathDelay)
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############################################################
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puts "--- set_max_delay -through ---"
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set_max_delay 8 -through [get_pins buf1/Z] -to [get_ports out1]
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report_checks -path_delay max -through [get_pins buf1/Z]
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puts "--- remove max_delay through ---"
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unset_path_exceptions -through [get_pins buf1/Z] -to [get_ports out1]
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############################################################
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# group_path with various options
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############################################################
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puts "--- group_path -name from_in1 ---"
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group_path -name from_in1 -from [get_ports in1]
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report_checks -path_delay max
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puts "--- group_path -name to_out1 ---"
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group_path -name to_out1 -to [get_ports out1]
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report_checks -path_delay max
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puts "--- group_path -name through_buf ---"
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group_path -name through_buf -through [get_pins buf1/Z]
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report_checks -path_delay max
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puts "--- report_checks -path_group ---"
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report_checks -path_delay max -path_group from_in1
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report_checks -path_delay max -path_group to_out1
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puts "--- path_group_names ---"
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set grp_names [sta::path_group_names]
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puts "Path group names: $grp_names"
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############################################################
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# report_check_types with individual flags
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############################################################
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puts "--- report_check_types -max_delay ---"
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report_check_types -max_delay
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puts "--- report_check_types -min_delay ---"
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report_check_types -min_delay
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puts "--- report_check_types -recovery ---"
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report_check_types -recovery
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puts "--- report_check_types -removal ---"
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report_check_types -removal
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puts "--- report_check_types -max_delay -min_delay together ---"
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report_check_types -max_delay -min_delay
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puts "--- report_check_types -recovery -removal ---"
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report_check_types -recovery -removal
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puts "--- report_check_types -clock_gating_setup ---"
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report_check_types -clock_gating_setup
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puts "--- report_check_types -clock_gating_hold ---"
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report_check_types -clock_gating_hold
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puts "--- report_check_types -clock_gating_setup -clock_gating_hold ---"
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report_check_types -clock_gating_setup -clock_gating_hold
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puts "--- report_check_types -min_pulse_width ---"
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report_check_types -min_pulse_width
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puts "--- report_check_types -min_period ---"
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report_check_types -min_period
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puts "--- report_check_types -max_skew ---"
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report_check_types -max_skew
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puts "--- report_check_types -max_slew ---"
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report_check_types -max_slew
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puts "--- report_check_types -max_capacitance ---"
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report_check_types -max_capacitance
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puts "--- report_check_types -max_fanout ---"
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report_check_types -max_fanout
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puts "--- report_check_types -violators ---"
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report_check_types -violators
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puts "--- report_check_types -violators -verbose ---"
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report_check_types -violators -verbose
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############################################################
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# worst_clock_skew
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############################################################
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puts "--- worst_clock_skew -setup ---"
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set ws [worst_clock_skew -setup]
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puts "worst_clock_skew setup: $ws"
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puts "--- worst_clock_skew -hold ---"
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set wh [worst_clock_skew -hold]
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puts "worst_clock_skew hold: $wh"
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############################################################
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# total_negative_slack / worst_slack / worst_negative_slack
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############################################################
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puts "--- total_negative_slack -max ---"
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set tns_max [total_negative_slack -max]
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puts "tns max: $tns_max"
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puts "--- total_negative_slack -min ---"
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set tns_min [total_negative_slack -min]
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puts "tns min: $tns_min"
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puts "--- worst_slack -max ---"
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set ws_max [worst_slack -max]
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puts "worst_slack max: $ws_max"
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puts "--- worst_slack -min ---"
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set ws_min [worst_slack -min]
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puts "worst_slack min: $ws_min"
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puts "--- worst_negative_slack -max ---"
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set wns_max [worst_negative_slack -max]
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puts "wns max: $wns_max"
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############################################################
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# endpoint_slack via path group names
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############################################################
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puts "--- endpoint_slack ---"
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set ep_pins [sta::endpoints]
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foreach ep $ep_pins {
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set eslack [sta::endpoint_slack $ep "clk" max]
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puts "endpoint_slack [get_full_name $ep] clk max: $eslack"
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break
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}
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############################################################
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# report_path with -min
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############################################################
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puts "--- report_path -min ---"
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set pin_arg [get_pins reg1/D]
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report_path -min $pin_arg rise
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puts "--- report_path -max ---"
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report_path -max $pin_arg fall
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############################################################
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# report_arrival / report_required / report_slack
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############################################################
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puts "--- report_arrival ---"
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report_arrival [get_pins reg1/D]
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puts "--- report_required ---"
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report_required [get_pins reg1/D]
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puts "--- report_slack ---"
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report_slack [get_pins reg1/D]
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