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Posted to commits@harmony.apache.org by "Alexey Varlamov (JIRA)" <ji...@apache.org> on 2006/11/22 15:56:04 UTC
[jira] Resolved: (HARMONY-2247) [drlvm][jit][performance]
System::arraycopy by 'rep move' instruction
[ http://issues.apache.org/jira/browse/HARMONY-2247?page=all ]
Alexey Varlamov resolved HARMONY-2247.
--------------------------------------
Resolution: Fixed
Applied at r478177, please verify. Thanks!
> [drlvm][jit][performance] System::arraycopy by 'rep move' instruction
> ---------------------------------------------------------------------
>
> Key: HARMONY-2247
> URL: http://issues.apache.org/jira/browse/HARMONY-2247
> Project: Harmony
> Issue Type: Improvement
> Components: DRLVM
> Environment: ia32
> Reporter: George Timoshenko
> Assigned To: Alexey Varlamov
> Attachments: arraycopy_rep_move_SVN.diff, ArraycopyTest.java
>
>
> Currenlty Jitrino::OPT instead of 'System::arraycopy' call generates a loop that copies arrays with respective checks.
> The improvements is in replacing the loop by 'rep move' instruction which is available on ia32.
> (This is possible as the instruction is now supported in Encoder. See the patch for HARMONY-2223)
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