[all-commits] [llvm/llvm-project] 4b65ca: [AArch64][SVE] Add custom lowering for bfloat FMUL...

[Benjamin Maxwell via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4b65cafa182a9b91131bfce986e815c9a4ab6ae5
      https://github.com/llvm/llvm-project/commit/4b65cafa182a9b91131bfce986e815c9a4ab6ae5
  Author: Benjamin Maxwell <macdue at dueutil.tech>
  Date:   2025-11-24 (Mon, 24 Nov 2025)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/test/CodeGen/AArch64/sve-bf16-arith.ll
    M llvm/test/CodeGen/AArch64/sve-bf16-combines.ll

  Log Message:
  -----------
  [AArch64][SVE] Add custom lowering for bfloat FMUL (with +bf16) (#167502)

This lowers an SVE FMUL of bf16 using the BFMLAL top/bottom instructions
rather than extending to an f32 mul. This does require zeroing the
accumulator, but requires fewer extends/unpacking.



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