entity na3_fp is  

   port 
     (
i0 : in bit ;
i1 : in bit ;
i2 : in bit ;
o : out bit ;
vdd : in bit ;
vss : in bit 
     );
   end na3_fp ;

architecture FUNCTIONNAL of na3_fp is 

begin
o <= not(i1 and i0 and i2) ;
end FUNCTIONNAL ;
