[PATCH] D156335: [RISCV] Simplify tablegen for XCV mac and mul instructions. NFC.

[Jim Lin via Phabricator via llvm-commits]

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CVInstMac reuses RVInstR that has the same encoding fields.

Add a new class CVInst16I that has specific encoding fields, and two
new class CVInstMac16I and CVInstMul16I that inherite CVInst16I with
different outs and ins.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D156335

Files:
  llvm/lib/Target/RISCV/RISCVInstrInfoXCV.td

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