LFSR-Random number generator

LFSR can be designed using XOR or XNOR gates. The taps that has been chosen here, are from XNOR, but the function uses XOR. as you see here: http://www.xilinx.com/support/documentation/application_notes/xapp052.pdf these taps are for XNOR. so please replace all the XOR in the lfsr_pkg to XNOR.