约束|additional
不考虑阵列的ck端时序,避免虚假时序违例
set_disable_timing -from CKA -to CKB [get_flat_cells -of_objects [get_flat_pins -hierarchical -filter "full_name=~*CKA || full_name=~*CKB" ]]
set_disable_timing -from CKB -to CKA [get_flat_cells -of_objects [get_flat_pins -hierarchical -filter "full_name=~*CKA || full_name=~*CKB" ]]