Hi,
I am doing my M-tech project on NoC router,and i wrote verilog code for mutexnet which is used in the arbiter of NoC router.
for 2i/p mutex i am getting the output.
but for 4 i/p mutexnet i am getting output as undefined state.
I am using Xilinx software(Isim simulator)
here is the circuit and code of mutexnet net.
please let me know if any changes to be made in the code to get a correct output.

please help me.

regards
sucheta