SCTL in fpga

I just wanted to check  how it works with 40Mhz defualt clock in  a single cycle timed loop in labview fpga. I generated a sine wave in sctl which runs with 40Mhz SCTL. I took another SCTL which runs with 80Mhz clock n i upconverted signal by interpolating with factor 2. I just want to know that first loop each sample takes 25ns(40Mhz) and 2nd loop each sample takes 12.5ns(80Mhz). How can i do this?? I am attaching my FPGA target pic..

Thank you...