Forum Discussion

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

How to use altfp_sqrt with the Nios II?

Hi, for the reason of data processing I need the NiosII to calculate a floating point square root many times. The calculation without extra hardware block is to slow to meet the timing requirement...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Thank you for this information.

I solved the problem already by instantiating the altfp_sqrt with Datain, Result and CLK_enable signals with the megawizard and afterwards implementing this vhdl-file as custom instruction with a fixed cycle length of 17 cycles. It works fine. The timing is really good.

Thank you!!!