FPGAs Have the Wrong Abstraction


#1

It’s not literally true because of course you don’t literally rewire an FPGA—it’s actually a 2D grid of lookup tables connected by a routing network, with some arithmetic units and memories thrown in for good measure. FPGAs do a pretty good job of faking arbitrary circuits, but they really are faking it, in the same way that a software circuit emulator fakes it.