RFR: 8275047: Optimize existing fill stubs for AVX-512 target [v3]

[Jatin Bhateja]

On Mon, 18 Oct 2021 16:27:35 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Why improvement for testLongFill (59, 89) is much worse (not existing) than for testDoubleFill? The element size is the same.

Hi Vladimir, currently fill stubs are not supported for long/double types, it could be run-to-run variation. Call overhead may over power any gain due to specialized blocks for small sizes.  I have updated the perf-results.

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PR: https://git.openjdk.java.net/jdk/pull/5967