32-bit fixed size instructions, that are aligned. That allows you to have 8-wide decoders for example. On x86, you can't really do this/didn't happen because t

32-bit fixed size instructions, that are aligned. That allows you to have 8-wide decoders for example. On x86, you can't really do this/didn't happen because the instructions are 1 to 15 bytes long, and you'll need to decode the prior instruction at least in part to determine where your current instr starts. (currently 4-wide decoders are available for x86 uArches)