The sort of things being targetted by one effort are listed at https://shakti.org.in/processors.html https://shakti.org.in/processors.html whether or not that

The sort of things being targetted by one effort are listed at https://shakti.org.in/processors.html https://shakti.org.in/processors.html whether or not that has anything to do with popcount. This SiFive one seems interesting for having the vector extension, though that hadn't been finalized the last I knew.