git: openjdk/jdk21u-dev: master: 8318509: x86 count_positives intrinsic broken for -XX:AVX3Threshold=0

[Paul Hohensee]

Changeset: ecd9166c
Branch: master
Author:    Satyen Subramaniam <ssubramaniam at openjdk.org>
Committer: Paul Hohensee <phh at openjdk.org>
Date:      2025-05-10 02:41:04 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/ecd9166c9330d888fd4b8d8b05510a2ec746db3a

8318509: x86 count_positives intrinsic broken for -XX:AVX3Threshold=0

Backport-of: e67550cfec4dbd1c8c2c9869dda34fa09a5c274b

! src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp
! test/hotspot/jtreg/compiler/intrinsics/string/TestCountPositives.java
! test/hotspot/jtreg/compiler/intrinsics/string/TestHasNegatives.java