K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2021-06-26T16:29:42.524104Z
K 7
svn:log
V 529
amd64: move memcmp checks upfront

This is a tradeoff which saves jumps for smaller sizes while making
the 8-16 range slower (roughly in line with the other cases).

Tested with glibc test suite.

For example size 3 (most common with vfs namecache) (ops/s):
before:	407086026
after:	461391995

The regressed range of 8-16 (with 8 as example):
before:	540850489
after:	461671032

(cherry picked from commit f1be262ec11c1c35e6485f432415b5b52adb505d)

Git Hash:   a3503647f776a96ae8e65b6225cc4f29ad573bf9
Git Author: mjg@FreeBSD.org
END