MATLAB_Function.vhd.bak

use work.cordic_types.all;
use work.dsm_pkg.all;

library ieee;
use ieee.std_logic_1164.all;
use ieee.math_real.all;
use ieee.numeric_std.all;
use ieee.fixed_pkg.all;

ENTITY quantizer IS
  PORT( u : IN  dsm_t;
        y : OUT dsm_t
        );
END quantizer;

ARCHITECTURE rtl OF quantizer IS

BEGIN
	even_quantizer_proc: process(u) is
	constant st : integer := nLev - 2;
	begin
		y <= to_sfixed(0, u);
		if u < to_sfixed(-st, u) then
			y <= to_sfixed(-nLev+1, u);
		elsif u >= to_sfixed(st, u) then
			y <= to_sfixed(nLev-1, u);
		else
			if nLev > 2 then
				for n in 1 to nLev-2 loop
					if (u >= to_sfixed(-nLev + 2*n, u)) and (u < to_sfixed(-nLev + 2*(n+1), u)) then
						y <= to_sfixed(2*n-1-nLev, u);
					end if;
				end loop;
			end if;
		end if;
	end process even_quantizer_proc;
END rtl;