Hi,

I kindly would like your help, I need to implement in Xilinx System Genrator an inversion like this:
_
Input : X (UFIX_48_25)
Output : 1/X (UFIX_48_38)

Any ideas ? Free IP cores or using xilinx blocks...,for I am a beginner.

Thanks in advance.

U need CORDIC Algorithm�just wiki that

I found a paper on CORDIC type inversion at,

http://www.ecti-thailand.org/assets/papers/1329_pub_54.pdf

However, on inspection, it doesn't appear that this approach does much more than old-fashioned long division done in base-two.

Numerical Recipes in C also publishes an interesting algorithm for extended long division. However, their algorithm depends upon cheap multiplies. If you have neither multiply nor divide, I'd go for the long division approach -- unless someone else has a better idea.

Dan