[PATCH][AArch64] Enable AES fusion with -mcpu=generic
Jim Wilson
jim.wilson@linaro.org
Fri Mar 17 03:26:00 GMT 2017
On Thu, Mar 16, 2017 at 11:01 AM, Andrew Pinski <apinski@cavium.com> wrote:
> On Thu, Mar 16, 2017 at 10:22 AM, Wilco Dijkstra <Wilco.Dijkstra@arm.com> wrote:
>> Many supported cores implement fusion of AES instructions. When fusion
>> happens it can give a significant performance gain. If not, scheduling
>> fusion candidates next to each other has almost no effect on performance.
>> Due to the high benefit/low cost it makes sense to enable AES fusion with
>> -mcpu=generic so that cores that support it always benefit. Any objections?
No objection. I'm not currently tracking performance of -mcpu=generic
on falkor, so I'm not very concerned about changes to the generic
tuning structure.
Jim
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