RFR: 8303553: AArch64: Add BCAX backend rule

[changpeng1997]

On Thu, 30 Mar 2023 10:02:24 GMT, Andrew Haley <aph at openjdk.org> wrote:

> > > > In addition, SHA-3 intrinsic has been removed so we cannot compare with it.
> > > 
> > > 
> > > When was it removed?
> > 
> > 
> > Sorry, it was disabled on AArch64 except Apple. #11382
> 
> OK, so it seems that adding a BCAX rule is not necessary for the AArch64 port of HotSpot.
> 
> In summary: BCAX was added to the instruction set for SHA-3, but it doesn't help much even in a hand-coded intrinsic. There is no significant performance advantage to be gained from this patch, and it adds a burden. I suggest that you should withdraw it. Thanks.

Ok. Thanks for your review.

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PR Comment: https://git.openjdk.org/jdk/pull/13222#issuecomment-1490035414