RFR: 8308856: jdk.internal.classfile.impl.EntryMap::nextPowerOfTwo math problem

[Andrey Turbanov]

On Thu, 25 May 2023 12:24:59 GMT, Adam Sotona <asotona at openjdk.org> wrote:

> Fix of jdk.internal.classfile.impl.EntryMap::nextPowerOfTwo returning correct zero power of two.
> 
> Please review.
> 
> Thanks,
> Adam

src/java.base/share/classes/jdk/internal/classfile/impl/EntryMap.java line 177:

> 175: 
> 176:     public static long nextPowerOfTwo( long x ) {
> 177:         return 1l << -Long.numberOfLeadingZeros(x - 1);

Suggestion:

        return 1L << -Long.numberOfLeadingZeros(x - 1);

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PR Review Comment: https://git.openjdk.org/jdk/pull/14148#discussion_r1208669192