vtr_flow/sdc/samples/combinational_default.sdc - third_party/vtr-verilog-to-routing - Git at Google

 create_clock -period 0 -name virtual_io_clock
 set_input_delay -clock virtual_io_clock -max 0 [get_ports{*}]
 set_output_delay -clock virtual_io_clock -max 0 [get_ports{*}]
	create_clock -period 0 -name virtual_io_clock
	set_input_delay -clock virtual_io_clock -max 0 [get_ports{*}]
	set_output_delay -clock virtual_io_clock -max 0 [get_ports{*}]