xor8.pat

i need of vhdl code for 32-bit risc processor

in xn1 (7 downto 0) B;
in xn2 (7 downto 0) B;
out xout (7 downto 0) B;

begin
p_0 : 00000000 01010101 ?01010101;
p_1 : 11011101 11100111 ?00111010;
p_3:  11000111 11111011 ?00111100;
pat17_alu : 00000000 00000000 ?00000000;
pat18_alu : 11111111 11111111 ?00000000;
pat19_alu : 11011101 11100111 ?00111010;
pat21_alu : 11011011 01011010 ?10000001;
pat22_alu:  11000111 11111011 ?00111100;
pat4_xor : 10101010 01010101 ?11111111;
pat5_xor : 10101110 01010111 ?11111001;
pat6_xor : 01110111 10011110 ?11101001;
pat6_xor : 11011011 10101111 ?01110100;
pat7_xor : 11010111 11101011 ?00111100;
end;