Feature gate: #![feature(stdarch_hexagon)]

This is a tracking issue for the hexagon intrinsics in core::arch::hexagon.

Public API

Contents of core::arch::hexagon.

Steps

• Add HVX support to portable-simd (see Add support for Hexagon HVX portable-simd#509)
• Let rustc emit the target features corresponding to each HVX rev (+hvxv65, +hvxv73, etc. -- see hexagon: Add HVX target features #151500)
• Create target-specific mappings for the HVX intrinsics (see arch: Add Hexagon HVX instructions stdarch#1999)
• Implement the RFC (cc @rust-lang/libs-team...
• Adjust documentation (see instructions on rustc-dev-guide)
• Style updates for any new syntax (nightly-style-procedure)
  • Style team decision on new formatting
  • Formatting for new syntax has been added to the Style Guide
  • (non-blocking) Formatting has been implemented in rustfmt
• Stabilization PR (see instructions on rustc-dev-guide)
• Fix for UNREACHABLE in llvm backend [hexagon] "Unhandled HVX operation" in portable_simd llvm/llvm-project#182520