RFR: 8358013: [PPC64] VSX has poor performance on Power8 [v2]

Wed May 28 22:33:31 UTC 2025

> Power8 only has limited VSX instructions for the superword optimization and the Vector API and the performance is bad. Let's only use it on Power9 and newer by default.

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  Improve description of 8358013: [PPC64] VSXSuperwordUseVSX.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25514/files
  - new: https://git.openjdk.org/jdk/pull/25514/files/0e1e116c..1f8b0e91

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25514&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25514&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25514.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25514/head:pull/25514

PR: https://git.openjdk.org/jdk/pull/25514