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Altera_Forum's avatar
Altera_Forum
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15 years ago

complex math in VHDL

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 numb...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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.