Re: New Intel Bug! Only affects memory read performance

Myrdraal (myrdraal@jackalz.dyn.ml.org)
Thu, 25 Dec 1997 11:56:21 -0500

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In reply to: Jeffrey B. Siegal: "Re: New Intel Bug! Only affects memory read performance"

On Thu, Dec 25, 1997 at 12:17:28AM -0800, Jeffrey B. Siegal wrote:
Hi,
> [snip]
> Supposedly (but I haven't investigated this myself) the MMX
> instructions are a lot faster than the floating point instructions; using
> them might produce a Pentium (MMX) memcpy patch with less of a penalty when
> the destination is in L1.
I don't think that would be feasible, due to the long time it takes to
switch to/from MMX mode.
> [snip]
-Myrdraal

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