x86 string instructions

Kyle Huey me at kylehuey.com
Tue Feb 24 19:38:24 PST 2015


On Tue, Feb 24, 2015 at 7:33 PM, Chris Jones <jones.chris.g at gmail.com>
wrote:

> Ugh.  That hurts :/.
>
> On Tue, Feb 24, 2015 at 3:12 PM, Kyle Huey <me at kylehuey.com> wrote
>>
>> The obvious alternative is to investigate using a different counter, such
>> as instructions-retired.  It might even be possible to use that only in
>> this situation, using retired-conditional-branches at all other times.
>>
>>
> ​Do REP instructions bump the insns-retired counter once per iteration?
> That's almost certainly undefined, we'd want to test.
>

Right.  Hence "investigate" :)

Obviously if they don't then that doesn't help.

- Kyle
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