Ping **(5./7.) ?
MASKR and MASKL are obvious candidates for unsigned, too; in the
previous version of the doc patch, I had promised that these would
take unsigned arguments in the future. What I had in mind was
they could take an unsigned argument and return an unsigned result.
Thinking about this a bit more, I realized that this was actually a
bad idea; nowhere else do we allow UNSIGNED for bit counting, and things
like checking for negative number of bits (which is illegal) would not
work.
Hence, two new intrinsics, UMASKL and UMASKR. Regressoin-tesed
(and this time, I added the intrinsics to the list, so no trouble
expected there :-)
OK for trunk?
