JDK-8279045 : Intrinsics missing vzeroupper instruction
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 11,17,18,19
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • CPU: x86_64
  • Submitted: 2021-12-20
  • Updated: 2022-01-03
  • Resolved: 2021-12-21
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JDK 18 JDK 19
18 b29Fixed 19Fixed
Related Reports
Relates :  
JDK-8225625 - AES Electronic Codebook (ECB) encryption and decryption optimization using AVX512 + VAES instructions
Description
The intrinsics added recently(AES, shift left, etc) are missing vzeroupper instruction.
Comments
Changeset: 9ee3ccfe Author: Smita Kamath <svkamath@openjdk.org> Committer: Sandhya Viswanathan <sviswanathan@openjdk.org> Date: 2021-12-21 22:09:43 +0000 URL: https://git.openjdk.java.net/jdk18/commit/9ee3ccfee2c9cc54ac7dca49fbf35135e627ef18
21-12-2021
Hi Christian, The VZEROUPPER instruction resets the upper 128 bits of all Intel AVX registers. It enables faster transition between 256-bit Intel AVX and Intel SSE code.
21-12-2021
Hi [~svkamath], how does this manifest?
21-12-2021
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk18/pull/52 Date: 2021-12-21 00:51:51 +0000
21-12-2021