Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Exponential function in vhdl

hiii I want to implement exp(x.^2) in VHDL for synthesis. Can any one suggest how to do it. Here x is in signed format and i want result in fixed point arithmatic i.e. without rondoff operation....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

--- Quote Start ---

For exponential, you will need to create a look up table filled with all the results.

The address input of the LUT is x and the output is your function.

--- Quote End ---

Thank you Tricky for your reply. May be I can write this lookup table in a package and call it for places where I need exponential function. If you have any sample program then please share.