[all-commits] [llvm/llvm-project] ac067a: [AMDGPU] Use v_pk_add_bf16 for scalar bf16 fadd on...

[Harrison Hao via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac067a7e1366f1a9fca74b2cb69d6b005c6b732e
      https://github.com/llvm/llvm-project/commit/ac067a7e1366f1a9fca74b2cb69d6b005c6b732e
  Author: Harrison Hao <57025411+harrisonGPU at users.noreply.github.com>
  Date:   2026-07-16 (Thu, 16 Jul 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/lib/Target/AMDGPU/SIISelLowering.h
    M llvm/test/CodeGen/AMDGPU/atomic_optimizations_global_pointer.ll
    M llvm/test/CodeGen/AMDGPU/bf16.ll
    M llvm/test/CodeGen/AMDGPU/global-atomicrmw-fadd.ll
    M llvm/test/CodeGen/AMDGPU/packed-fneg-fsub-bf16.ll

  Log Message:
  -----------
  [AMDGPU] Use v_pk_add_bf16 for scalar bf16 fadd on gfx1250/gfx13 (#209128)

Targets with packed bf16 instructions can do a scalar bf16 fadd with a
single `v_pk_add_bf16` operating on the low half, instead of promoting
to f32 and going through `v_fma_mix_f32_bf16 + v_cvt_pk_bf16_f32`.



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