Revert "[RISCV] add the MC layer support of Zfinx extension"

This reverts commit 7798ecca9c3db42241169d31fea4fb820ed01830.

As reported in https://reviews.llvm.org/D93298#3331641 and
following, this causes assertion failures with inline assembly.

1 files changed, 0 insertions, 32 deletions

diff --git a/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp b/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp
index 1894799..ff96b2b 100644
--- a/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp
+++ b/llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp
@@ -161,17 +161,6 @@ static DecodeStatus DecodeGPRCRegisterClass(MCInst &Inst, uint64_t RegNo,
   return MCDisassembler::Success;
 }
 
-static DecodeStatus DecodeGPRPF64RegisterClass(MCInst &Inst, uint64_t RegNo,
-                                               uint64_t Address,
-                                               const void *Decoder) {
-  if (RegNo >= 32 || RegNo & 1)
-    return MCDisassembler::Fail;
-
-  MCRegister Reg = RISCV::X0 + RegNo;
-  Inst.addOperand(MCOperand::createReg(Reg));
-  return MCDisassembler::Success;
-}
-
 static DecodeStatus DecodeVRRegisterClass(MCInst &Inst, uint64_t RegNo,
                                           uint64_t Address,
                                           const void *Decoder) {
@@ -438,27 +427,6 @@ DecodeStatus RISCVDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
       return MCDisassembler::Fail;
     }
     Insn = support::endian::read32le(Bytes.data());
-    if (STI.getFeatureBits()[RISCV::FeatureStdExtZdinx] &&
-        !STI.getFeatureBits()[RISCV::Feature64Bit]) {
-      LLVM_DEBUG(dbgs() << "Trying RV32Zdinx table (Double in Integer and"
-                           "rv32)\n");
-      Result = decodeInstruction(DecoderTableRV32Zdinx32, MI, Insn, Address,
-                                 this, STI);
-      if (Result != MCDisassembler::Fail) {
-        Size = 4;
-        return Result;
-      }
-    }
-
-    if (STI.getFeatureBits()[RISCV::FeatureStdExtZfinx]) {
-      LLVM_DEBUG(dbgs() << "Trying RVZfinx table (Float in Integer):\n");
-      Result = decodeInstruction(DecoderTableRVZfinx32, MI, Insn, Address, this,
-                                 STI);
-      if (Result != MCDisassembler::Fail) {
-        Size = 4;
-        return Result;
-      }
-    }
     LLVM_DEBUG(dbgs() << "Trying RISCV32 table :\n");
     Result = decodeInstruction(DecoderTable32, MI, Insn, Address, this, STI);
     Size = 4;