RFR: 8308465: Reduce memory reads in AArch64 MD5 intrinsic [v2]

[Yi-Fan Tsai]

On Sat, 20 May 2023 10:03:32 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Yi-Fan Tsai has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Rename and optimize
>
> src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp line 3458:
> 
>> 3456:     RegSet saved_regs = RegSet::range(r16, r22) - r18_tls;
>> 3457:     Cached64Bytes reg_cache(_masm, buf, RegSet::of(r14, r15) + saved_regs);
>> 3458: 
> 
> Perhaps add a note here to the effect that the rest of this patch requires there to be **exactly** 8 registers in this set. Maybe assert that here?

This requirement has been asserted in the constructor.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14068#discussion_r1199654480