Question:

How exactly is the 300 MFLOPS number calculated for the F28335?

If the frequency for the FPU still runs at 150MHz, is the 300 MFLOPS based on the Benchmark Fixed Point vs Floating Point calculations?


Answer:

Traditionally, for floating-point devices, the MFLOPS was always calculated as the number of floating-point operations that can be performed every cycle.

So, on the F28335, you can perform an ADD and MPY operation every cycle, so that means the MFLOPS is 150MHz * 2 = 300MFLOPS.

If you want to stretch the definition as far as the C67x devices, if you add in the load/store units, then on the F28335 you can perform a MPY + ADD + Load or Store every cycle, then the MFLOPS should be 150MHz * 3 = 450MFLOPS.

Basically - the number can mean something and can also mean nothing.