| Date | Wed, 4 Mar 2015 14:58:53 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH v2 15/15] x86/lib/memcpy_64.S: Convert memcpy to ALTERNATIVE_2 macro |
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On Wed, Mar 04, 2015 at 08:26:33AM +0100, Ingo Molnar wrote: > Since most CPUs we care about have ERMS, wouldn't it be better to > patch in the actual memcpy_erms sequence into the primary memcpy() > function? It's just about 9 bytes AFAICT.
Actually, most set REP_GOOD - all Intel family 6 and all relevant AMDs.
And only the newer Intels have ERMS. My SNB, for example doesn't while IVB has it. So I'd guess everything >= IVB would have it.
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply. --
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