200 lines
7.5 KiB
Tcl
200 lines
7.5 KiB
Tcl
# Test deep derating paths and disable timing with from/to on instances.
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# Targets:
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# Sdc.cc: setTimingDerate (global, cell, inst, net with rf/clk_data),
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# disable (cell from/to, instance from/to, lib port, port, pin),
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# removeDisable variants, disabledEdgesSorted,
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# setClockGatingCheck (global, clock, pin, instance)
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# WriteSdc.cc: writeDeratings (global type-specific, cell, instance, net),
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# writeDerating (DeratingFactorsGlobal, DeratingFactorsCell,
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# DeratingFactors with type/early_late/clk_data/rf),
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# writeDisabledCells (all, from/to, from, to, timingArcSets),
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# writeDisabledInstances (from/to), writeDisabledPins,
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# writeDisabledPorts, writeDisabledLibPorts,
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# timingDerateTypeKeyword
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# DeratingFactors.cc: isOneValue, factor, hasValue
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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 sdc_test2.v
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link_design sdc_test2
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create_clock -name clk1 -period 10 [get_ports clk1]
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create_clock -name clk2 -period 20 [get_ports clk2]
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set_input_delay -clock clk1 2.0 [get_ports in1]
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set_input_delay -clock clk1 2.0 [get_ports in2]
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set_input_delay -clock clk2 2.0 [get_ports in3]
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set_output_delay -clock clk1 3.0 [get_ports out1]
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set_output_delay -clock clk2 3.0 [get_ports out2]
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############################################################
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# Timing derate - global with specific types
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############################################################
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# Global early/late
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set_timing_derate -early 0.95
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set_timing_derate -late 1.05
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# Global with clock/data separation
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set_timing_derate -early -clock 0.97
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set_timing_derate -late -clock 1.03
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set_timing_derate -early -data 0.94
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set_timing_derate -late -data 1.06
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# Global with type-specific (cell_delay, cell_check, net_delay)
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set_timing_derate -early -cell_delay 0.96
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set_timing_derate -late -cell_delay 1.04
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set_timing_derate -early -cell_check 0.98
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set_timing_derate -late -cell_check 1.02
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set_timing_derate -early -net_delay 0.93
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set_timing_derate -late -net_delay 1.07
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# Global with rise/fall
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set_timing_derate -early -cell_delay -clock -rise 0.96
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set_timing_derate -late -cell_delay -clock -fall 1.04
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set_timing_derate -early -cell_delay -data -rise 0.95
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set_timing_derate -late -cell_delay -data -fall 1.05
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report_checks
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############################################################
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# Timing derate on lib cells
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############################################################
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set_timing_derate -early -cell_delay 0.91 [get_lib_cells NangateOpenCellLibrary/INV_X1]
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set_timing_derate -late -cell_delay 1.09 [get_lib_cells NangateOpenCellLibrary/INV_X1]
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set_timing_derate -early -cell_check 0.90 [get_lib_cells NangateOpenCellLibrary/DFF_X1]
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set_timing_derate -late -cell_check 1.10 [get_lib_cells NangateOpenCellLibrary/DFF_X1]
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############################################################
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# Timing derate on instances
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############################################################
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set_timing_derate -early -cell_delay 0.89 [get_cells buf1]
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set_timing_derate -late -cell_delay 1.11 [get_cells buf1]
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set_timing_derate -early -cell_check 0.88 [get_cells reg1]
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set_timing_derate -late -cell_check 1.12 [get_cells reg1]
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############################################################
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# Timing derate on nets
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############################################################
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set_timing_derate -early -net_delay 0.87 [get_nets n1]
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set_timing_derate -late -net_delay 1.13 [get_nets n1]
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set_timing_derate -early -net_delay 0.86 [get_nets n3]
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set_timing_derate -late -net_delay 1.14 [get_nets n3]
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report_checks
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############################################################
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# Write SDC (exercises all derating writer paths)
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############################################################
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set sdc1 [make_result_file sdc_derate1.sdc]
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write_sdc -no_timestamp $sdc1
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############################################################
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# Reset deratings
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############################################################
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unset_timing_derate
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############################################################
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# Disable timing - cell from/to variants
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############################################################
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# Disable entire lib cell
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set_disable_timing [get_lib_cells NangateOpenCellLibrary/BUF_X1]
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# Disable with from only
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set_disable_timing [get_lib_cells NangateOpenCellLibrary/INV_X1] -from A
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# Disable with to only
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set_disable_timing [get_lib_cells NangateOpenCellLibrary/NAND2_X1] -to ZN
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# Disable with from and to
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set_disable_timing [get_lib_cells NangateOpenCellLibrary/NOR2_X1] -from A1 -to ZN
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# Disable with from and to - second arc
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set_disable_timing [get_lib_cells NangateOpenCellLibrary/NOR2_X1] -from A2 -to ZN
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report_checks
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############################################################
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# Disable timing - instance from/to variants
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############################################################
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# Disable entire instance
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set_disable_timing [get_cells buf1]
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# Disable instance with from/to
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set_disable_timing [get_cells and1] -from A1 -to ZN
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set_disable_timing [get_cells and1] -from A2 -to ZN
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# Disable instance with from only
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set_disable_timing [get_cells or1] -from A1
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# Disable instance with to only
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set_disable_timing [get_cells nand1] -to ZN
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report_checks
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############################################################
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# Disable timing - pin
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############################################################
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set_disable_timing [get_pins inv1/A]
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############################################################
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# Disable timing - port
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############################################################
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set_disable_timing [get_ports in1]
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############################################################
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# Write SDC with disables
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############################################################
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set sdc2 [make_result_file sdc_derate2.sdc]
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write_sdc -no_timestamp $sdc2
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set sdc3 [make_result_file sdc_derate3.sdc]
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write_sdc -no_timestamp -compatible $sdc3
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############################################################
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# Unset all disables
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############################################################
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unset_disable_timing [get_lib_cells NangateOpenCellLibrary/BUF_X1]
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unset_disable_timing [get_lib_cells NangateOpenCellLibrary/INV_X1] -from A
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unset_disable_timing [get_lib_cells NangateOpenCellLibrary/NAND2_X1] -to ZN
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unset_disable_timing [get_lib_cells NangateOpenCellLibrary/NOR2_X1] -from A1 -to ZN
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unset_disable_timing [get_lib_cells NangateOpenCellLibrary/NOR2_X1] -from A2 -to ZN
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unset_disable_timing [get_cells buf1]
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unset_disable_timing [get_cells and1] -from A1 -to ZN
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unset_disable_timing [get_cells and1] -from A2 -to ZN
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unset_disable_timing [get_cells or1] -from A1
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unset_disable_timing [get_cells nand1] -to ZN
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unset_disable_timing [get_pins inv1/A]
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############################################################
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# Clock gating check - global/clock/instance/pin
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############################################################
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set_clock_gating_check -setup 0.5 [current_design]
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set_clock_gating_check -hold 0.3 [current_design]
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set_clock_gating_check -setup 0.4 [get_clocks clk1]
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set_clock_gating_check -hold 0.2 [get_clocks clk1]
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set_clock_gating_check -setup 0.35 [get_cells reg1]
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set_clock_gating_check -hold 0.15 [get_cells reg1]
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set_clock_gating_check -setup 0.3 [get_pins reg2/CK]
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set_clock_gating_check -hold 0.1 [get_pins reg2/CK]
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############################################################
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# Disabled edges sorted
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############################################################
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set disabled [sta::disabled_edges_sorted]
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puts "disabled_edges_sorted count = [llength $disabled]"
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############################################################
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# Final write
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############################################################
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set sdc4 [make_result_file sdc_derate4.sdc]
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write_sdc -no_timestamp $sdc4
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report_checks
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