double precision multiplication

Thanx for pointing this out. I will keep this alternative in mind.

But before i decide to add a hardware FPU i would like to make sure that it is actually needed. 1100 cycles for a single double precision multiply operation sounds too big to be true. So, i am suspecting that i am doing something wrong here. Perhaps someone from Altera could say a word here.

I wouldn't like to add a hardware FPU now and find out later that i am actually "killing a mosquito using a cannon!"

I am using the Nios II/f and something like 50 cycles per double percision multiply operation would be more than enough for my application.