RFR: 8338023: Support two vector selectFrom API [v7]

[Emanuel Peter]

On Fri, 30 Aug 2024 14:02:46 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Adding descriptive comments
>
> src/hotspot/cpu/x86/x86.ad line 10490:
> 
>> 10488: 
>> 10489: 
>> 10490: instruct selectFromTwoVec_evex(vec dst, vec src1, vec src2)
> 
> You could rename `dst` -> `mask_and_dst`. That would maybe help the reader to more quickly know that it is an input-mask and output-dst.

Also, for consistency, I would write out the name `selectFromTwoVector(s)_evex`

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PR Review Comment: https://git.openjdk.org/jdk/pull/20508#discussion_r1741772354