After I generate a SPI 4.2 v8.3 Core in the CORE Generator and click on the "View Resource Utilization (Under Original Project Settings)" option, the following Information Message occurs:
"Unable to gather Resource Utilization Information for pl4_v8_3. Single top-level netlist not found. "
This message occurs because there are two netlists created for the SPI-4.2 Core. One netlist is for the sink and one is for the source. Currently, CORE Generator cannot calculate the resouce utilization from multiple netlists.
The resouce usage of the SPI-4.2 Core is provided on page 1 of the data sheet in the "LogiCORE Facts" section.