[all-commits] [llvm/llvm-project] 70f83f: [RISCV] add support for zbkx subextension in MC la...

[SForeKeeper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 70f83f308449710a55c4898f18f06949df2d1559
      https://github.com/llvm/llvm-project/commit/70f83f308449710a55c4898f18f06949df2d1559
  Author: SForeKeeper <zkliu6 at gmail.com>
  Date:   2022-01-24 (Mon, 24 Jan 2022)

  Changed paths:
    M llvm/lib/Support/RISCVISAInfo.cpp
    M llvm/lib/Target/RISCV/RISCV.td
    M llvm/lib/Target/RISCV/RISCVInstrInfoZb.td
    M llvm/lib/Target/RISCV/RISCVSchedRocket.td
    M llvm/lib/Target/RISCV/RISCVSchedSiFive7.td
    M llvm/lib/Target/RISCV/RISCVSubtarget.h
    M llvm/test/CodeGen/RISCV/attributes.ll
    M llvm/test/MC/RISCV/attribute-arch.s
    A llvm/test/MC/RISCV/rv32zbkx-invalid.s
    A llvm/test/MC/RISCV/rv32zbkx-valid.s

  Log Message:
  -----------
  [RISCV] add support for zbkx subextension in MC layer.

This patch adds support for zbkx extension from K extension(v1.0.0) in MC layer.
Instructions with same functionality and same encoding is defined in the bitmanip extension.
It defines {Xperm8, Xperm4} as instruction aliases for xperm.* in Zbp extension. When Zbkx is enabled while Zbp is not, xperm.h will not be available. When Zbkx and Zbp are both enabled, the instructions will be decoded in Zbp format.

[[ https://reviews.llvm.org/D94999 | D94999 ]] this is the patch that introduces xperm.* instructions.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D117889