Aggiunti moduli Swap, TwoComplement, OperationCheck

TwoComplement.vhd

@@ -0,0 +1,31 @@
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+entity TwoComplement is
+	generic(BITCOUNT : integer := 8);
+	port(
+		DIFF_EXP_C2 : in std_logic_vector((BITCOUNT-1) downto 0);
+		DIFF_EXP_ABS : out std_logic_vector((BITCOUNT-2) downto 0);
+	);
+end TwoComplement;
+
+architecture TwoComplementArch of TwoComplement is
+	signal S : std_logic;
+	signal M : std_logic_vector((BITCOUNT-2) downto 0);
+begin
+	S <= DIFF_EXP_C2(BITCOUNT-1);
+	M <= DIFF_EXP_C2((BITCOUNT-2) downto 0);
+	
+	C2 : process(DIFF_EXP_C2)
+	begin
+		for i in (BITCOUNT-2) downto 0 loop
+			M(i) <= S xor M(i);
+		end loop;
+	end process;
+	
+	--sommare 1 a M se S = '1'
+	
+	DIFF_EXP_ABS <= M;
+
+end TwoComplementArch;
+