>Spoiler, it's not much because most of the actual execution time is spent in a handful of basic OPs.
Yet, on a CISC ISA, you still have to support everything else, which is essentially cruft.
Does that matter? I lean towards the yes-the-ISA-matters camp, but I'm also under the impression that most silicon is dark.
Spoiler, it's not much because most of the actual execution time is spent in a handful of basic OPs.
Branch prediction is where the magic happens today.