Catapult C floating point exp() function?

How is your experience with Catapult C? Does it work?

I don't have an answer to your exact question, but if you don't find a built-in function, a lookup table or a Maclaurin series are your best bets.

Hi,

If you have Catapult-SL, you should be able to use the C-Core feature and wrap-up a module from flopoco

Ragards,

Steven

numbers. If yes is the generated RTL description vendor independent and the modules used sharable or open etc.?

@ Kevin...Did not try it yet...I will tell when i try it but most consider catapult C as one of the most robust...

Thanks for the replies...I will try and check back

I used to work on the development a high-level design tool but it never worked out well. Plus, Verilog/VHDL keep getting more abstract all the time. But I'm always interested to hear about these other tools.

If you can't use a lookup, the Horner-style Maclaurin for y=exp(x) isn't too hard. Something like:

y=1; temp=1; for n = 1 to N temp = temp * x/n; y = y + temp; end

Accuracy depends on N. You can store the reciprocals of n in a ROM so you don't have to do divides. If x is purely imaginary, just use a sin/cos lookup.

orked out well. Plus, Verilog/VHDL keep getting more abstract all the time . But I'm always interested to hear about these other tools.

t too hard. Something like:

u don't have to do divides. If x is purely imaginary, just use a sin/cos l ookup.

The general idea for these tool seems promising. I have only tried vivado h ls up until now and it looks really promising. Even though it does not seem fully functional yet...These tool are still very immature but in my opinio n they have the potential to become the norm quite soon...

I managed to obtain a university license for the calypto catapult C. Does a nyone know if the C-core feature is activated in such a license?