I know I had made a big mess in my previos message.. I try to explain better and shortly...
I've received some precious advices in this newsgroup about an unavailable block adder for floating point, and some of you adviced me to use libraries for floating point found in the web..
I have already included a foreign library in a project with Xilinx Project Navigator, without any problems...but I can't do the same in the Quartus II of Altera !! When I compile the foreign library I find a lot of errors without sense!! (e.g. the compiler can't find the top level entity of the project ..)
in short: how can I include a library in a project compiled with the quartus II ?someone has been able to do this???
thank you...Cecilia