complex math in VHDL

Altera_Forum · ‎06-22-2011

Hi,

I wonder if there is any synthesizable VHDL code/Library to deal with math operations on complex numbers; especially transforming into/from polar. The library math_complex uses "real numbers" which is, as far as I know, not synthesizable.

thankx

Altera_Forum · ‎06-22-2011

reals are not synthesisable.

There are no other synthesisable libraries that deal with it - but there is nothing to stop you writing your own, especially if you use the new fixed point libraries.

Just delcare a record type:


type complex_fixed_t is record
  rl : sfixed(7 downto -7);
  imag : sfixed(7 downto -7);
end record complex_fixed_t;

or something like that and you can create all sorts of functions that will be fully synthesisable.