JDK-8005544 : Use 256bit YMM registers in arraycopy stubs on x86
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • CPU: x86
  • Submitted: 2012-12-27
  • Updated: 2022-01-07
  • Resolved: 2013-01-04
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JDK 7 JDK 8 Other
7u40Fixed 8Fixed hs24Fixed
Related Reports
Relates :  
JDK-8279621 - x86: Arraycopy stubs should use 256-bit copies with AVX=1
Relates :  
JDK-8005419 - Improve intrinsics code performance on x86 by using AVX2
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.
Comments
URL: http://hg.openjdk.java.net/hsx/hsx25/hotspot/rev/e2e6bf86682c User: amurillo Date: 2013-01-11 12:07:43 +0000
11-01-2013
URL: http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/e2e6bf86682c User: kvn Date: 2013-01-04 03:44:27 +0000
04-01-2013