What does PAPI_FP_INS really count?

[arrazem]

Hi:

I'm doing dynamic instrumentation of code on an Intel Xeon processor. I'm trying to count the # of FP instructions.
I can't seem to get the instrumentation's count to make even closely to what PAPI_FP_INS is giving me.

So, I was wondering what PAPI_FP_INS is really counting. Does it count floating point loads and stores?
What does PAPI consider as an FP instruction?

[arrazem]

UPDATE:

So, after alot of experiments, it turns out that on this CPU (Intel Xeon), PAPI_FP_INS counts all FP instructions that produce an FP value(to a register or mem), but it does not count the following kinds of FP instruction:
1. No loads/stores (MOV instructions) involving FP values
2. No FP instructions that don't produce a value such as a FP compare

Hope that would help someone in the future.