JDK-8318650 : Optimized subword gather for x86 targets.
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 22
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • CPU: x86_64
  • Submitted: 2023-10-23
  • Updated: 2025-03-11
  • Resolved: 2024-04-21
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JDK 23
23 b20Fixed
Related Reports
Relates :  
JDK-8326664 - Gather index checking under mask
Relates :  
JDK-8351623 - AArch64: Add vector gather load implementation for subword types with SVE
Relates :  
JDK-8331150 - RISC-V: Fix "bad AD file" bug
Description
Current java implementation of sub-word gather APIs allocates additional storage to accumulate values from gather indices, by intrinsifying these APIs we can save these expensive allocations and emit optimized JIT sequence for various targets.
Comments
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/16354 Date: 2023-10-25 04:34:59 +0000
01-08-2024
Changeset: 185e711b Author: Jatin Bhateja <jbhateja@openjdk.org> Date: 2024-04-21 23:21:17 +0000 URL: https://git.openjdk.org/jdk/commit/185e711bfe4c4d013b56e867f85cfb4177b3a2cf
21-04-2024
Testing v15, commit 14: bash submitTesting.sh 16354 tier1,tier2,tier3,tier4,hs-comp-stress,hs-precheckin-comp https://mach5.us.oracle.com/mdash/jobs/emanuel-jdk-review-20240227-1014-6962209
27-02-2024
[~jbhateja], please add at least a minimal description. Thanks!
24-10-2023