1.3.2 Synthesis Tool and Global Management

The synthesis tool may promote all clocks to global. The number of globals in your top-level design should be same as number of globals allowed in the device (8 or 16 depending on the device size) you are targeting. You may need to reduce or limit the number of globals in your block by adding row global or plan to share globals in the top-level design with the block. Add a row global, directly to your HDL (RCLKINT).