K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2018-11-20T18:14:30.231401Z
K 7
svn:log
V 477
MFC r339531,r339579,r340252,r340463,r340464,340472,r340587

amd64: tidy up memset to have rax set earlier for small sizes
amd64: finish the tail in memset with an overlapping store
amd64: align memset buffers to 16 bytes before using rep stos
amd64: convert libc bzero to a C func to avoid future bloat
amd64: sync up libc memset with the kernel version
amd64: handle small memset buffers with overlapping stores
Fix -DNO_CLEAN amd64 build after r340463

Approved by:	re (gjb)

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