JDK-7100757 : The BitSet.nextSetBit() produces incorrect result in 32bit VM on Sparc
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 8-pool
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: solaris_10
  • CPU: sparc
  • Submitted: 2011-10-13
  • Updated: 2014-03-13
  • Resolved: 2011-11-10
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JDK 6 JDK 7 JDK 8 Other
6u34Fixed 7u2 b12Fixed 8Fixed hs20.9Fixed
Related Reports
Relates :  
JDK-6823354 - Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}()
Relates :  
JDK-6996240 - The BitSet.length method sometimes returns an index+1 value less than that of the highest bit set.
Description
BitSet.nextSetBit() may produce incorrect result in 32bit VM on Sparc.

countTrailingZerosL() should use iRegIsafe dst register:

-instruct countTrailingZerosL(iRegI dst, iRegL src, flagsReg cr) %{
+instruct countTrailingZerosL(iRegIsafe dst, iRegL src, flagsReg cr) %{

I will add a regression test.
Comments
EVALUATION http://hg.openjdk.java.net/hsx/hsx22/hotspot/rev/714bf7aefe10
19-10-2011
EVALUATION http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/4bac06a82bc3
15-10-2011
EVALUATION See description.
14-10-2011