[PATCH] D154183: [LoongArch] Add definition for LSX instructions

[wanglei via Phabricator via llvm-commits]

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This patch adds the definition for the `LSX` registers and instructions.
It also adds handling for new immediate operands in the AsmParser. This
patch ensures that llvm-mc and llvm-objdump correctly handle the `LSX`
instructions.

We expand those pseudo-instructions `vrepli.{b,h,w,d}` in the
MCCodeEmitter. This increases the readability of the output when
generating assembly files.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D154183

Files:
  llvm/lib/Target/LoongArch/AsmParser/LoongArchAsmParser.cpp
  llvm/lib/Target/LoongArch/Disassembler/LoongArchDisassembler.cpp
  llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
  llvm/lib/Target/LoongArch/LoongArchLSXInstrFormats.td
  llvm/lib/Target/LoongArch/LoongArchLSXInstrInfo.td
  llvm/lib/Target/LoongArch/LoongArchRegisterInfo.td
  llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCCodeEmitter.cpp

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