A configurable logic block (CLB) which includes a function generator, carry logic and a first multiplexer. To operate the CLB as a multiplier, the function generator and the carry logic are each coupled to receive a first multiplier bit, a second multiplier bit and a carry signal. The function generator...http://www.google.de/patents/US6020756?utm_source=gb-gplus-sharePatent US6020756 - Multiplexer enhanced configurable logic block
