[Bug target/29776] result of ffs/clz/ctz/popcount/parity are already sign-extended

[sgunderson at bigfoot dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29776

--- Comment #7 from sgunderson at bigfoot dot com ---
Wait, sorry, someone's already pointed that out. Ignore me, then...

I can at least confirm it still happens with GCC 4.8.1.