JDK-8223198 : Enhance auto vectorization for aarch64
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 13
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • CPU: aarch64
  • Submitted: 2019-05-01
  • Updated: 2021-10-12
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Other
tbdUnresolved
Related Reports
Relates :  
JDK-8241484 - Optimizing vector logic not operation
Relates :  
JDK-8222074 - Enhance auto vectorization for x86
Relates :  
JDK-8240248 - Extend superword reduction optimizations for x86
Description
JDK-8222074 "Enhance auto vectorization for x86" provided the framework for more vector operations in C2, but did did the implementation for x86.

"Add support for the following additional vector operations for x86:
1) Absolute for all data types
2) Shifts for byte data types
3) Shift right arithmetic for long data type
4) Byte multiply
5) Negate for float/double
"
JDK-8240248 "Extend superword reduction optimizations for x86"  Extend superword reduction optimizations to support and, or, xor reduction. 

JDK-8241484 Optimizing vector logic not operation 

Investigate implementing on aarch64.
Comments
I think this has been addressed by: JDK-8243240: AArch64: Add support for MulVB JDK-8243597: AArch64: Add support for integer vector abs JDK-8243155: AArch64: Add support for SqrtVF JDK-8213134: AArch64: vector shift failed with MaxVectorSize=8 JDK-8223347: Integration of Vector API (Incubator)
06-11-2020
Not proposing for JDK13 unless investigation shows significant benefits.
01-05-2019