32 BIT BARREL SHIFTER IN VERILOG

32 BIT BARREL SHIFTER IN VERILOG

32-BIT BARREL SHIFTER

module barrel (
input [n:0]in,
input [4:0]sh,
input shift_LeftRight,rotate_LeftRight,
output reg [n:0] out);
parameter n=31;
always@*
begin
if(~shift_LeftRight)
out = in<<sh;
else if(shift_LeftRight)
out = in>>sh;
else
begin
case(sh)
5b00001:
out=(~rotate_LeftRight)?{in[n-1:0],in[n]}:{in[0],in[n:1]};
5b00010:
out=(~rotate_LeftRight)?{in[n-2:0],in[n:n-1]}:{in[1:0],in[n:2]};
5b00011:
out=(~rotate_LeftRight)?{in[n-3:0],in[n:n-2]}:{in[2:0],in[n:3]};
5b00100:
out=(~rotate_LeftRight)?{in[n-4:0],in[n:n-3]}:{in[3:0],in[n:4]};
5b00101:
out=(~rotate_LeftRight)?{in[n-5:0],in[n:n-4]}:{in[4:0],in[n:5]};
5b00110:
out=(~rotate_LeftRight)?{in[n-6:0],in[n:n-5]}:{in[5:0],in[n:6]};
5b00111:
out=(~rotate_LeftRight)?{in[n-7:0],in[n:n-6]}:{in[6:0],in[n:7]};
5b01000:
out=(~rotate_LeftRight)?{in[n-8:0],in[n:n-7]}:{in[7:0],in[n:8]};
5b01001:
out=(~rotate_LeftRight)?{in[n-9:0],in[n:n-8]}:{in[8:0],in[n:9]};
5b01010:
out=(~rotate_LeftRight)?{in[n-10:0],in[n:n-9]}:{in[9:0],in[n:10]};
5b01011:
out=(~rotate_LeftRight)?{in[n-11:0],in[n:n-10]}:{in[10:0],in[n:11]};
5b01100:
out=(~rotate_LeftRight)?{in[n-12:0],in[n:n-11]}:{in[11:0],in[n:12]};
5b01101:
out=(~rotate_LeftRight)?{in[n-13:0],in[n:n-12]}:{in[12:0],in[n:13]};
5b01110:
out=(~rotate_LeftRight)?{in[n-14:0],in[n:n-13]}:{in[13:0],in[n:14]};
5b01111:
out=(~rotate_LeftRight)?{in[n-15:0],in[n:n-14]}:{in[14:0],in[n:15]};
5b10000:
out=(~rotate_LeftRight)?{in[n-16:0],in[n:n-15]}:{in[15:0],in[n:16]};
5b10001:
out=(~rotate_LeftRight)?{in[n-17:0],in[n:n-16]}:{in[16:0],in[n:17]};
5b10010:
out=(~rotate_LeftRight)?{in[n-18:0],in[n:n-17]}:{in[17:0],in[n:18]};
5b10011:
out=(~rotate_LeftRight)?{in[n-19:0],in[n:n-18]}:{in[18:0],in[n:19]};
5b10100:
out=(~rotate_LeftRight)?{in[n-20:0],in[n:n-19]}:{in[19:0],in[n:20]};
5b10101:
out=(~rotate_LeftRight)?{in[n-21:0],in[n:n-20]}:{in[20:0],in[n:21]};
5b10110:
out=(~rotate_LeftRight)?{in[n-22:0],in[n:n-21]}:{in[21:0],in[n:22]};
5b10111:
out=(~rotate_LeftRight)?{in[n-23:0],in[n:n-22]}:{in[22:0],in[n:23]};
5b11000:
out=(~rotate_LeftRight)?{in[n-24:0],in[n:n-23]}:{in[23:0],in[n:24]};
5b11001:
out=(~rotate_LeftRight)?{in[n-25:0],in[n:n-24]}:{in[24:0],in[n:25]};
5b11010:
out=(~rotate_LeftRight)?{in[n-26:0],in[n:n-25]}:{in[25:0],in[n:26]};
5b11011