openbsd/src/regress/lib/libc/ffs, branch OPENBSD_7

openbsd/src/regress/lib/libc/ffs, branch OPENBSD_7_4 A mirror of https://github.com/libressl/openbsd.git https://git.lua4.win/openbsd/atom?h=OPENBSD_7_4 2020-06-26T20:16:22+00:00 Provide an optimized implementation of ffs(3) in libc on 2020-06-26T20:16:22+00:00 naddy 2020-06-26T20:16:22+00:00 urn:sha1:b91521c26a7d91551cdf6d308d850f95efa5c748 aarch64/powerpc/powerpc64, making use of the count leading zeros instruction. Also add a brief regression test. ok deraadt@ kettenis@