> 
> Does anyone know whether the NetBSD kernel and libc actually 
> uses those cool CISC instructions you get on the VAX, like
> INSQUE and REMQUE and all the string stuff and mutex stuff
> etc.? Would be a waste if we'd use queing routines programmed
> in C :-)
> 
insque/remque are used to manipulate the process queues, yes. 
scanc/skpc are used by the ffs code.
movc3/movc5/locc are used for memcpy/memset/strlen (bcopy/bzero/...)
ffs is just ffs(3).

libc only uses a few of them because there are VAXen that do not have 
them in hardware that gets extremely slow if those isns's are used...

-- Ragge