Re: [PATCH] Re-implemented i586 asm AES (updated)

[Andi Kleen]

James Morris <jmorris@xxxxxxxxxx> writes:
>
>> Does it work on x86 CPUs without MMX?
>
> Yes, Linus removed the MMX stuff.

You could use .altinstructions to patch a jump in at runtime
based on CPU capabilities. Assuming MMX is really faster of course.

See arch/x86_64/lib/copy_page.S for an example.

-Andi

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