git: openjdk/jdk21u-dev: master: 8349637: Integer.numberOfLeadingZeros outputs incorrectly in certain cases

[Paul Hohensee]

Changeset: 2439c6d5
Branch: master
Author:    Paul Hohensee <phh at openjdk.org>
Date:      2025-04-14 15:02:41 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/2439c6d5aaff7d9ee2a5be4c7caa5f9ccd65b748

8349637: Integer.numberOfLeadingZeros outputs incorrectly in certain cases

Reviewed-by: rkennke
Backport-of: 3657e92ead1e678942fcb272e77c3867eb5aa13e

! src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp
! test/hotspot/jtreg/compiler/vectorization/TestNumberOfContinuousZeros.java
+ test/hotspot/jtreg/compiler/vectorization/TestVectorZeroCount.java