What the VTune analyzer can expose in regards to this question largely depends on the processor. Look for an event such as "FP Instructions Retired". I know that some of the Pentium 4 processors have a similar event and this can be used to estimate total FP ops. Sampling is statistical, so it will not be exact. Also, I don't remember seeing an event to separate fpadds from fpsubs, etc., but you will need to look at the events for the processor you are tuning on.