ALU-32bit

implemented in VHDL language
Useed Xilinx ISE
It Can do 24 functions. It has two 8-bit inputs, A,B.

Inputs and functions are:

Clk : one bit std_logic

P: 32 bit std_logic_vector

P(7 downto 0)= A

P(15 downto 8)= B

P(18 downto 16)= logic operation
000 : and
001 : or
010: xor
011 : nand
100 : nor
101 : xnor
110 : not (A or B :depends on P(28) )

P(21 downto 19) = arithmetic
000 : A+B
001 : A-B
010 : A*B
011 : +1 (A or B :depends on P(28) )
100 : -1 (A or B :depends on P(28) )
101 : A?B (result = agb (A>b), alb (A<B) , aeb (A=B))

P( 24 downto 22) = number of shift
P( 27 downto 25) = six shift operators
000 : srl (A or B :depends on P(28) )
001 : sra (A or B :depends on P(28) )
010 : ror (A or B :depends on P(28) )
011 : sll (A or B :depends on P(28) )
100 : sla (A or B :depends on P(28) )
101 : rol (A or B :depends on P(28) )

P(28)= select A or B

P(29)= put A on out bas

P(30)= put B on out bas

P(31)= Reset