RFR: 8291118: [vectorapi] Optimize the implementation of lanewise FIRST_NONZERO

[Xiaohong Gong]

On Mon, 15 Aug 2022 16:17:35 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

> Looks good.

Thanks for looking at this patch @PaulSandoz ! 

> Much better to flip the operation and the receiver + first arg to the blend.

I'm not quite understand what the flip operation here mean. The current code is simple enough to me. Could you please show more details? Thanks a lot!

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PR: https://git.openjdk.org/jdk/pull/9683