Input 1 Output 16-bit ALU Input 2 Select line (SO-S3) The Arithmetic Logic Unit (ALU) is the heart of a CPU. The ALU performs mathematical, logical, and decision operations such as AND, OR, XOR, XNOR, NAND and inverter etc. An ALU is a combinational logic circuit that can have more inputs and only one output. ALU's output is dependent only on inputs which are applied at that instant and not on past conditions. A simple ALU in its basic form consists of two inputs for the operand data, one input for selecting the required operation and one output for the result according to selected operation. Table 1 represents the ALU operations. According to the select line input appropriate operation is performed between two inputs. Write VHDL code to implement the ALU. SO S1 S2 S3 ion ADD SUB MUL DIV AND OR NOT 1 OR 0 NOT NAND NOR XOR 1NAND Input2 NORI 0 SHR ROL (nput) 0 ROR SHIFT RIGHT Input 1 Output 16-bit ALU Input 2 Select line (SO-S3) The Arithmetic Logic Unit (ALU) is the heart of a CPU. The ALU performs mathematical, logical, and decision operations such as AND, OR, XOR, XNOR, NAND and inverter etc. An ALU is a combinational logic circuit that can have more inputs and only one output. ALU's output is dependent only on inputs which are applied at that instant and not on past conditions. A simple ALU in its basic form consists of two inputs for the operand data, one input for selecting the required operation and one output for the result according to selected operation. Table 1 represents the ALU operations. According to the select line input appropriate operation is performed between two inputs. Write VHDL code to implement the ALU. SO S1 S2 S3 ion ADD SUB MUL DIV AND OR NOT 1 OR 0 NOT NAND NOR XOR 1NAND Input2 NORI 0 SHR ROL (nput) 0 ROR SHIFT RIGHT