JDK-8273322 : Enhance macro logic optimization for masked logic operations.
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 18
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: x86_64
  • Submitted: 2021-09-03
  • Updated: 2025-01-13
  • Resolved: 2022-01-06
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JDK 19
19 b05Fixed
Related Reports
Relates :  
JDK-8294331 - [TESTBUG] TestMaskedMacroLogicVector is part of tier3 on riscv
Relates :  
JDK-8283103 - compiler/vectorapi/TestMaskedMacroLogicVector.java failed due to incorrect os.simpleArch on some platforms
Relates :  
JDK-8346954 - [TESTBUG] MaskedLogicOpts.java fails due to IndexOutOfBoundsException
Relates :  
JDK-8286283 - assert(func2 == 0 && func3 == 0) failed: not unary
Description
- Extend the existing algorithm to facilitate macro logic inferencing if constituents vector logic operations are predicated. 
- Support for masked Vector API BITWISE_BLEND operation.
- X86 AVX512 targets have predicated VPTERNLOG instructions which can be emitted for evaluating masked logic expression tree.
Comments
Changeset: 8703f148 Author: Jatin Bhateja <jbhateja@openjdk.org> Date: 2022-01-06 18:41:06 +0000 URL: https://git.openjdk.java.net/jdk/commit/8703f14808d7256d4b07e7ea8a232889bbca4894
06-01-2022
A pull request was submitted for review. URL: https://git.openjdk.java.net/jdk/pull/6893 Date: 2021-12-20 13:33:01 +0000
20-12-2021