[PATCH] D58932: [RISCV] Allow access to FP CSRs without F extension

[Ana Pazos via Phabricator via llvm-commits]

apazos created this revision.
Herald added subscribers: jocewei, PkmX, rkruppe, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb.

Floating-point CSRs should be accessible even when F extension is not enabled.

RISC-V spec is pending update to reflect this behavior.  GNU tools already implement this behavior.


https://reviews.llvm.org/D58932

Files:
  lib/Target/RISCV/RISCVInstrInfo.td
  lib/Target/RISCV/RISCVInstrInfoF.td
  lib/Target/RISCV/RISCVSystemOperands.td
  test/MC/RISCV/csr-aliases.s
  test/MC/RISCV/rv32-user-csr-names.s
  test/MC/RISCV/rv32i-valid.s
  test/MC/RISCV/rvf-user-csr-names.s
  test/MC/RISCV/user-csr-names-invalid.s

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