Write the VERILOG code for an arithmetic/logic unit (ALU) with atest bench that does the following with 4 bit inputs , and can betested in on nexys 4 board

This is to be implement on : ISE Design Suite - Xilinx

/* ALU Arithmetic and Logic Operations----------------------------------------------------------------------|ALU_Sel|  ALU Operation----------------------------------------------------------------------| 0000 |  ALU_Out = A + B;----------------------------------------------------------------------| 0001 |  ALU_Out = A - B;----------------------------------------------------------------------| 0010 |  ALU_Out = A * B;----------------------------------------------------------------------| 0011 |  ALU_Out = A / B;----------------------------------------------------------------------| 0100 |  ALU_Out = A << 1;----------------------------------------------------------------------| 0101 |  ALU_Out = A >> 1;----------------------------------------------------------------------| 0110 |  ALU_Out = A rotated left by 1;----------------------------------------------------------------------| 0111 |  ALU_Out = A rotated right by 1;----------------------------------------------------------------------| 1000 |  ALU_Out = A and B;----------------------------------------------------------------------| 1001 |  ALU_Out = A or B;----------------------------------------------------------------------| 1010 |  ALU_Out = A xor B;----------------------------------------------------------------------| 1011 |  ALU_Out = A nor B;----------------------------------------------------------------------| 1100 |  ALU_Out = A nand B;----------------------------------------------------------------------| 1101 |  ALU_Out = A xnor B;----------------------------------------------------------------------| 1110 |  ALU_Out = 1 if A>B else 0;----------------------------------------------------------------------| 1111 |  ALU_Out = 1 if A=B else 0;