On Sat, Jan 9, 2016 at 9:57 AM, Andy Lutomirski <luto(a)amacapital.net> wrote:
On Sat, Jan 9, 2016 at 9:48 AM, Tony Luck <tony.luck(a)gmail.com>
It's the fast string extension, aka Enhanced REP MOV STOS. On CPUs
with that feature (and not disabled via MSR), plain ol' rep movs is
the fastest way to copy bytes. I think this includes all Intel CPUs
from SNB onwards.
Ah ... very fast at copying .. but currently not machine check recoverable.