RFR: 8322768: Optimize non-subword vector compress and expand APIs for AVX2 target. [v5]

[Jatin Bhateja]

On Tue, 16 Jan 2024 07:08:57 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Each long/double permute lane holds 64 bit value.
>
> @jatin-bhateja so why do you shift by 5? I thought 4 longs are 32 bit?

For long/double each permute row is 32 byte in size, so a shift by 5 to compute row address.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17261#discussion_r1457747672