[jdk21u-dev] RFR: 8318509: x86 count_positives intrinsic broken for -XX:AVX3Threshold=0

[Goetz Lindenmaier]

On Wed, 30 Apr 2025 23:06:51 GMT, Satyen Subramaniam <ssubramaniam at openjdk.org> wrote:

> Backporting JDK-8318509: x86 count_positives intrinsic broken for -XX:AVX3Threshold=0. Fix pulls the value from tmp1, which contains the correct value. Adds test. Ran GHA Sanity Checks, local Tier 1 and 2, and new `test/hotspot/jtreg/compiler/intrinsics/string/TestCountPositives.java` tests. Patch is clean.

I successfully ran this through SAPs testing.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/1726#issuecomment-2861929929