(0.46) x86-64: Implement an enhancement for byte array and char array System.arraycopy #202
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The setup to run `rep movsd` is not efficient on copying smaller sizes. The enhancement inlines copy size equal or less than 64 bytes without using `rep movsd`. Signed-off-by: Annabelle Huo <Annabelle.Huo@ibm.com>
The setup to run `rep movsb` is not efficient on copying smaller sizes. The enhancement inlines copy size equal or less than 64 bytes without using `rep movsb`. Co-Authored-By: Henry Zongaro <zongaro@ca.ibm.com> Signed-off-by: Annabelle Huo <Annabelle.Huo@ibm.com>
`disableArrayCopyByteArrayInlineSmallSizeWithoutREPMOVS` - Disable array copy enhancement for 8 bit primitive array `disableArrayCopyCharArrayInlineSmallSizeWithoutREPMOVS` - Disable array copy enhancement for 16 bit primitive array Signed-off-by: Annabelle Huo <Annabelle.Huo@ibm.com>
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This PR ports eclipse-omr/omr#7332 into
v0.46.0release.Implement an enhancement for byte array and char array System.arraycopy on x86-64.
Also add JIT options that disable array copy enhancement:
disableArrayCopyEnhancementByteArray: Disable array copy enhancement for 8 bit primitive arraydisableArrayCopyEnhancementCharArray: Disable array copy enhancement for 16 bit primitive array