JDK-8368778 : x86 backend support for add/mul reduction operations for Float16
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 26
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • OS: generic
  • CPU: x86_64
  • Submitted: 2025-09-26
  • Updated: 2025-09-26
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Other
tbdUnresolved
Related Reports
Relates :  
JDK-8351488 - Improve performance of floating point reduction kernels
Relates :  
JDK-8366444 - Add support for add/mul reduction operations for Float16
Relates :  
JDK-8365967 - C2 compiler support for HalffloatVector operations supported by auto-vectorization flow
Description
Given that the auto-vectorized generated vector reduction operations are strictly ordered, there may not be any tangible performance uplift, while the vector API is relaxed in terms of precision requirements, which allows application of D&C to build a reduction tree.