JDK-8241018 : 32-bit integer log2 functions return the wrong value for negative arguments on 64-bit machines
- Type: Bug
- Component: hotspot
- Sub-Component: runtime
- Affected Version: openjdk8u212,11.0.3,14,15
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2020-03-13
- Updated: 2020-03-24
- Resolved: 2020-03-18
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| JDK 15 |
|---|
15 b15Fixed  |
Related Reports
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Description
log2_int() should return 32 for all negative arguments: the intention is to find the most significant set bit in x. This does not work on 64-bit machines because the argument is sign extended to 64 bits before being converted to uintptr_t.
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