fulladd.vbe

i need of vhdl code for 32-bit risc processor

ENTITY fulladd IS
PORT (
aval : IN bit_vector(4 downto 0);
bval : IN bit_vector(4 downto 0);
res : OUT bit_vector(4 downto 0);
carrout : OUT BIT
);
END fulladd;

ARCHITECTURE fulladd_arch OF fulladd IS

SIGNAL c :bit_vector(3 downto 0);

begin
res(0)<=aval(0) XOR bval(0);
c(0)<=aval(0) AND bval(0);
res(1)<=aval(1) XOR bval(1) XOR  c(0);
c(1) <=( ( aval(1) AND bval(1) ) OR  ( ( aval(1) XOR bval(1) ) AND c(0) ) );
res(2) <=aval(2) XOR bval(2) XOR c(1);
c(2) <=( ( aval(2) AND bval(2) ) OR  ( ( aval(2) XOR bval(2) ) AND c(1) ) );
res(3) <=aval(3) XOR bval(3) XOR c(2);
c(3) <=( ( aval(3) AND bval(3) ) OR  ( ( aval(3) XOR bval(3) ) AND c(2) ) );
res(4) <=aval(4) XOR bval(4) XOR c(3);
carrout <=( ( aval(4) AND bval(4) ) OR  ( ( aval(4) XOR bval(4) ) AND c(3) ) );
end;