[all-commits] [llvm/llvm-project] 78bd0c: [AArch64][BFloat] add BFloat instruction support f...

[Ties Stuij via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 78bd0c0e5e8fbbfbb9f827bdd1f83f91ed3437fa
      https://github.com/llvm/llvm-project/commit/78bd0c0e5e8fbbfbb9f827bdd1f83f91ed3437fa
  Author: Ties Stuij <ties.stuij at arm.com>
  Date:   2020-05-27 (Wed, 27 May 2020)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.td
    A llvm/test/CodeGen/AArch64/bf16-vector-bitcast.ll
    A llvm/test/CodeGen/AArch64/bf16-vector-shuffle.ll
    A llvm/test/CodeGen/AArch64/bf16.ll

  Log Message:
  -----------
  [AArch64][BFloat] add BFloat instruction support for AArch64

Summary:
Add support for lowering various BFloat related SelDAG nodes:
- load/store (ldrh/strh)
- concat
- dup/duplane
- bitconvert/bitcast
- insert_subvector/insert_subreg

This patch is part of a series implementing the Bfloat16 extension of the
Armv8.6-a architecture, as detailed here:

https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/arm-architecture-developments-armv8-6-a

The bfloat type, and its properties are specified in the Arm Architecture
Reference Manual:

https://developer.arm.com/docs/ddi0487/latest/arm-architecture-reference-manual-armv8-for-armv8-a-architecture-profile

Reviewers: ab, t.p.northover, john.brawn, fpetrogalli, sdesmalen, LukeGeeson

Reviewed By: fpetrogalli

Subscribers: LukeGeeson, pbarrio, kristof.beyls, hiraditya, danielkiss, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79712