JDK-8005544 : Use 256bit YMM registers in arraycopy stubs on x86
  • Type: Enhancement
  • Status: Resolved
  • Resolution: Fixed
  • Component: hotspot
  • Sub-Component: compiler
  • Priority: P4
  • CPU: x86
  • Submit Date: 2012-12-27
  • Updated Date: 2013-06-26
  • Resolved Date: 2013-01-04
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JDK 7 JDK 8
7u40Fixed 8Resolved
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Description
New x86 processors with AVX2 have wide memory bus and improved memory operations with YMM registers. Use them to copy data in arraycopy stubs.