Hi, It have coded a block that pops out a value Q of type std_logic_vector(n downto 0). This value is a function of N, also of type std_logic_vector(m downto 0) The type of function the block calculates is something like Q = INT(k x SIN(w x N)+y) In my test vectors I would like be able to write something like assert (conv_real(Q) - ( k x SIN(w x conv_real(N))+y ) < 3.0) report "Failure. Bad result" severity failure; My Question: Is there functions like conv_real, and SIN ? How do i do it? Thanks Willem