| create_clock -period 2 clk | |
| create_clock -period 3 clk2 | |
| create_clock -period 3.5 -name virtual_io_clock | |
| set_clock_groups -exclusive -group {clk} -group {clk2} | |
| set_input_delay -clock virtual_io_clock -max 0 [get_ports{*}] | |
| set_output_delay -clock virtual_io_clock -max 0 [get_ports{*}] |