JDK-8279668 : x86: AVX2 versions of vpxor should be asserted
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 8,11,17,18,19
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2022-01-10
  • Updated: 2022-03-16
  • Resolved: 2022-01-11
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JDK 11 JDK 17 JDK 18 JDK 19
11.0.16-oracleFixed 17.0.4-oracleFixed 18.0.2Fixed 19 b05Fixed
Related Reports
Relates :  
JDK-8279621 - x86_64 arraycopy stubs should use 256-bit copies with AVX=1
Relates :  
JDK-8005419 - Improve intrinsics code performance on x86 by using AVX2
Description
Got the SIGILLs on some machines when testing JDK-8279621. That patch started using shorter vpxor versions on UseAVX = 1 path, which tried to use VEX.256-encoded vpxor instruction that is only available on AVX2. This should be at very least asserted in assembler code.
Comments
Fix Request (18u, 17u, 11u) Strengthens the asserts for incompatible hardware. Applies cleanly.
10-03-2022
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk18u/pull/39 Date: 2022-03-10 11:46:51 +0000
10-03-2022
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk11u-dev/pull/872 Date: 2022-03-10 11:47:42 +0000
10-03-2022
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk17u-dev/pull/226 Date: 2022-03-10 11:47:16 +0000
10-03-2022
Changeset: 2bbeae3f Author: Aleksey Shipilev <shade@openjdk.org> Date: 2022-01-11 10:28:47 +0000 URL: https://git.openjdk.java.net/jdk/commit/2bbeae3f056243a224b0bda021f16cdcbee3b3d6
11-01-2022
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk/pull/7005 Date: 2022-01-10 10:31:30 +0000
10-01-2022