计算block port相关的data delay Sync

先选中需要报delay的port，然后source下面脚本：

foreach_in_collection j_obj [get_selection ] {

	set j_name [get_object_name $j_obj ]

	if { [get_timing_path -through $j_obj ] == "" } {
		puts "# No path through $j_name"
		continue
	}

	set j_direction [get_attr $j_obj direction ]
	if { $j_direction == "in" } { 
		set j_path [get_timing_path -from $j_obj ]
		set j_clock_latency [get_attr $j_path startpoint_clock_latency ] 
		set j_arrival [get_attr $j_path arrival ]
#		set j_input_delay [get_attr [get_input_delays -of_objects $j_obj ] max_rise ]
		set j_input_delay 0.5
		set j_data_delay [expr $j_arrival - $j_clock_latency - $j_input_delay ]
	}
	if { $j_direction == "out" } { 
		set j_path [get_timing_path -to $j_obj ]
		set j_clock_latency [get_attr $j_path startpoint_clock_latency ] 
		set j_arrival [get_attr $j_path arrival ]
		set j_data_delay [expr $j_arrival - $j_clock_latency ]
	}

	puts "$j_name \t $j_direction \t $j_data_delay"

}