[all-commits] [llvm/llvm-project] 8a002d: [RISCV][MC] Add FLI instruction support for the ex...

[joshua-arch1 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8a002d40f598b08398a7620f1d5760f0d783c3c7
      https://github.com/llvm/llvm-project/commit/8a002d40f598b08398a7620f1d5760f0d783c3c7
  Author: Jun Sha (Joshua) <cooper.joshua at linux.alibaba.com>
  Date:   2023-03-07 (Tue, 07 Mar 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
    M llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
    M llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.cpp
    M llvm/lib/Target/RISCV/MCTargetDesc/RISCVInstPrinter.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoZfa.td
    M llvm/test/MC/RISCV/zfa-invalid.s
    M llvm/test/MC/RISCV/zfa-valid.s

  Log Message:
  -----------
  [RISCV][MC] Add FLI instruction support for the experimental zfa extension

This implements experimental support for the RISCV Zfa extension as specified here: https://github.com/riscv/riscv-isa-manual/releases/download/draft-20221119-5234c63/riscv-spec.pdf, Ch. 25. This extension has not been ratified. Once ratified, it'll move out of experimental status.

This change adds assembly support for load-immediate instructions (fli.s/fli.d/fli.h). The assembly prefers decimal constants in C-like syntax. In my implementation, an integer encoding ranging from 0 to 31 can also be accepted, but for the MCInst printer, the constant is specified in decimal notation by default.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D140460