[PATCH] D117311: [RISCV] Add CSRs defined in the recently ratified Sstc extension

[Alex Bradbury via Phabricator via llvm-commits]

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The 'RISC-V "stimecmp / vstimecmp" Extension' was ratified at the end of
last year though hasn't yet been integrated in the main specification
documents (see
https://wiki.riscv.org/display/TECH/Recently+Ratified+Extensions).

RISC-V "stimecmp / vstimecmp" Extension
https://github.com/riscv/riscv-time-compare/releases/download/v0.5.4/Sstc.pdf.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D117311

Files:
  llvm/lib/Target/RISCV/RISCVSystemOperands.td
  llvm/test/MC/RISCV/hypervisor-csr-names.s
  llvm/test/MC/RISCV/rv32-hypervisor-csr-names.s
  llvm/test/MC/RISCV/rv32-only-csr-names.s
  llvm/test/MC/RISCV/rv32-supervisor-csr-names.s
  llvm/test/MC/RISCV/supervisor-csr-names.s

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