JDK-8004835 : Improve AES intrinsics on x86
  • Type: Enhancement
  • Status: Resolved
  • Resolution: Fixed
  • Component: hotspot
  • Sub-Component: compiler
  • Priority: P3
  • CPU: x86
  • Submit Date: 2012-12-11
  • Updated Date: 2013-06-26
  • Resolved Date: 2012-12-20
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JDK 7 JDK 8
7u40Resolved 8Resolved
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Description
1. Allow to run AES intrinsics on non-AVX cpus because pshufb instructions references only aligned memory "key_shuffle_mask".

2. Group together aes instructions in encryptBlock/decryptBlock stubs: pre-load keys into separate xmm registers before aes instructions.