[glangdale]

Maybe you're right, although 'Stockholm syndrome' feels a bit strong.

Agreed that stuff like CLZ/popcount/rotate etc should not be tucked away in a weird extension. I'm a bit alarmed at RISC-V's tendency to fragment into a gazillion subsets (the argument is that it's better to at least define the subsets rather than have a nightmare of incompatible and overlapping extensions, but still).