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SubjectRe: 1.2.13 __generic_memcpy_tofs cures crashes
On  9 Apr 96 at 9:42, Alan Cox wrote:

> > movsl", on the assumption that the interlock problem is between the
> > shift/movsl instruction (but that's unlikely: that particular
> > combination shows up even in normal code). That would be:
>
> Actually Linus take a look at the pentium errata for some steppings. Im
> sure one of the early 100MHz parts had a bug for something like rep movs*
> instructions taking a path that was out of spec under a few conditions.
> I'll look it up tonight.
>
> So maybe the cyrix has a similar oops ;)
>
> Alan

It sounds hard for the victims, but it seems to be wise to get a new
CPU. The clib also uses assembler, and gcc creates such patterns,
too. BTW does anybody know of a similar problem in an AMD 486 DX/4
100MHz?

Ulrich


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