JDK-8346236 : Auto vectorization support for various Float16 operations
  • Type: Sub-task
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 25
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: x86_64
  • Submitted: 2024-12-15
  • Updated: 2025-10-27
  • Resolved: 2025-04-10
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JDK 25
25 b19Fixed
Related Reports
Causes :  
JDK-8370409 - Incorrect computation in Float16 reduction loop
Relates :  
JDK-8356537 - TestFloat16VectorOperations wastes CPU time
Relates :  
JDK-8345298 - RISC-V: Add riscv backend for Float16 operations - scalar
Relates :  
JDK-8365967 - C2 compiler support for HalffloatVector operations supported by auto-vectorization flow
Relates :  
JDK-8366845 - C2 SuperWord: wrong VectorCast after VectorReinterpret with swapped src/dst type
Relates :  
JDK-8350960 - RISC-V: Add riscv backend for Float16 operations - vectorization
Description
Support vectorization of Float16 scalar operations (add/subtract/divide/multiply/sqrt/fma) encompassing the following tasks.
   1. C2 compiler New Vector IR creation. 
   2. Auto-vectorization support.
   3. x86 backend implimentation.
   4. Add IR verification tests for each newly supported vector operation.
Comments
Changeset: 9a3f9997 Branch: master Author: Jatin Bhateja <jbhateja@openjdk.org> Date: 2025-04-10 09:44:58 +0000 URL: https://git.openjdk.org/jdk/commit/9a3f9997b68a1f64e53b9711b878fb073c3c9b90
10-04-2025
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/22755 Date: 2024-12-15 20:06:40 +0000
26-02-2025