LAYERED APPROACH TO INTRINSIC EVOLVABLE HARDWARE 
USING DIRECT BITSTREAM  MANIPULATION OF VIRTEX II PRO DEVICES
Rashad S. Oreifej, Rawad N. Al-Haddad, Heng Tan and Ronald F. DeMara

ABSTRACT 
An integrated platform for fast genetic operators is presented to support intrinsic evolution on Xilinx Virtex II Pro Field Programmable Gate Arrays (FPGAs). Dynamic bitstream compilation is achieved by directly manipulating the bitstream using a layered design. Experimental results on a case study have shown that a full design as well as a full repair is achievable using this platform with an average time of 0.4 microseconds to perform the genetic mutation, 0.7 microseconds to perform the genetic crossover, and 5.6 milliseconds for one input pattern intrinsic evaluation.  This represents a performance advantage of three orders of magnitude over JBITS and more than seven orders of magnitude over the Xilinx design tool driven flow for realizing intrinsic genetic operators on a Virtex II Pro device.