This is not the case for the FPGAs targeted here. Encryption is optional on Xilinx 7-Series. Also there already is an open source toolchain coming up for them

This is not the case for the FPGAs targeted here. Encryption is optional on Xilinx 7-Series. Also there already is an open source toolchain coming up for them. http://www.clifford.at/yosys/ http://www.clifford.at/yosys/