Before I can be bullish on RISC-V, I really need to see a set of basic bitwise instructions -- minimally, popcount and count-leading-zeros (i.e. integer log-base-2).

When I last looked at the (tabled) bitwise extensions, they had been bloated out of all reason with really wild bit-shuffling apparatus.

I understand those last are very useful to some people, but if they interfere with getting a fast popcount in the core ISA, we can't afford them.