[jdk17u-dev] RFR: 8269404: Base64 Encoding optimization enhancements for x86 using AVX-512 [v2]

[Scott Gibbons]

> This is a backport of JDK-8269404: Base64 Encoding optimization enhancements for x86 using AVX-512. Backport is clean.
> 
> We have had numerous customer requests for this functionality to be backported due to the performance improvement.
> 
> There will be three additional PRs for which this is a dependency. This PR is dependent on PR #860.
> 
> Risk: I view the risk of this backport to be minimal. This code has been in use for many months with no bugs reported.
> 
> Testing: x86_64 build, affected tests, tier1
> 
> Thanks,
> --Scott

Scott Gibbons has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/861/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/861/files/e8ff3f11..e8ff3f11

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=861&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=861&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/861.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/861/head:pull/861

PR: https://git.openjdk.org/jdk17u-dev/pull/861