JDK-8052081 : Optimize code generated by C2 for Intel's Atom processor
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: x86
  • Submitted: 2014-07-25
  • Updated: 2023-09-21
  • Resolved: 2014-08-05
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JDK 8 JDK 9
8u40Fixed 9 b28Fixed
Related Reports
Relates :  
JDK-8316679 - C2 SuperWord: wrong result, load should not be moved before store if not comparable
Relates :  
JDK-8059780 - SPECjvm2008-MPEG performance regressions on x64 platforms
Description
Atom processor does not have AVX unit but it has SSE so we still can do vectorization.
CRC32 assembler code can be modified to use only SSE instructions to execute it on Atom processors too.
Comments
URL: http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/76913ad3cd41 User: lana Date: 2014-08-28 21:56:57 +0000
28-08-2014
URL: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/76913ad3cd41 User: kvn Date: 2014-08-05 23:15:26 +0000
05-08-2014