Operators (arithmetic logic units) and links (wires) in the application specific integrated circuit are like fixed houses and roads in the city; blocks and virtual wires in the field programmable gate array are like fixed houses and variable roads; what would it be called if virtual operators and virtual links inside are like variable houses and roads?

In fact, the arithmetic logic unit before cost down is equivalent to a memory module, which is removed the redundant gates for fixed purposes. However, fixedly placed arithmetic logic units will cause virtual wires consuming more time and space than the original memory module, so it is better to use the replaceable virtual operators to replace the fixed ones.

Of course, the best is that the switch gatecon itself is a non-volatile memory.