Re: rep movsb vs. simpler instructions for memcpy/memmove

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Sujet : Re: rep movsb vs. simpler instructions for memcpy/memmove
De : monnier (at) *nospam* iro.umontreal.ca (Stefan Monnier)
Groupes : comp.arch
Date : 13. Mar 2025, 22:48:48
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <jwv34fg1u29.fsf-monnier+comp.arch@gnu.org>
References : 1 2 3 4 5 6 7 8 9 10 11 12
User-Agent : Gnus/5.13 (Gnus v5.13)
Scott Lurndal [2025-03-13 21:42:25] wrote:
Michael S <already5chosen@yahoo.com> writes:
On Thu, 13 Mar 2025 19:35:33 +0000
mitchalsup@aol.com (MitchAlsup1) wrote:
Using MTRRs one can switch the kind of memory
to and from point in the middle of a REP MOVs.
How exactly?
The REP MOV straddles the boundary between two MTRRs.

Why/when would this happen in practice?


        Stefan

Date Sujet#  Auteur
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1 Mar 25 +* Re: Why VAX Was the Ultimate CISC and Not RISC220Anton Ertl
1 Mar 25 i+* Re: Why VAX Was the Ultimate CISC and Not RISC25MitchAlsup1
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