How can i use CORDIC ?

Thanks Daix. Now i understand.

However i can't multipliy a std_logic_vector (or a signed) for an integer. Can i?

And does this := to_signed(integer(0.85*ScalingFactor),VectorsSize) ; work? Is it sinthetizable? I think i saw this on the fixed_point lib

i tried the following:

constant um_terco     : signed (40 downto 0) := to_signed(integer(0.3333),41);
  signal Va1_real      : std_logic_vector (117 downto 0);
signal temp_fasor_real8      : std_logic_vector (76 downto 0);
Va1_real =  std_logic_vector(um_terco * signed(temp_fasor_real8))

where temp-fasor_real8 = 1773 in binary

however the result was 0..