> The alternative is to have 16 decoders, each decoding what an instruction /would/ be if it started at a given byte. These all complete in parallel, but many o

> The alternative is to have 16 decoders, each decoding what an instruction /would/ be if it started at a given byte. These all complete in parallel, but many of them might produce garbage. So we need to find the first five of these that have non-garbage outputs, and /then/ mux those sixteen possible outputs down to five channels. I believe reading somewhere that that's pretty much how more or less recent Intel processors do that.