+set_instance_assignment -name PARTITION_HIERARCHY no_file_for_top_partition -to | -section_id Top
+set_global_assignment -name PARTITION_NETLIST_TYPE SOURCE -section_id Top
+set_global_assignment -name VERILOG_FILE ../../megacells/fifo_4k_18.v
+set_global_assignment -name VERILOG_FILE ../../sdr_lib/atr_delay.v
+set_global_assignment -name VERILOG_FILE ../../sdr_lib/cic_dec_shifter.v