Method EnterOp

FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp:2965–2997

}

void OpDispatchBuilder::EnterOp(OpcodeArgs) {
  const auto GPRSize = GetGPROpSize();
  const auto OperandSize = (Op->Flags & FEXCore::X86Tables::DecodeFlags::FLAG_OPERAND_SIZE) ? OpSize::i16Bit : GPRSize;
  const uint64_t Value = Op->Src[0].Literal();

  const uint16_t AllocSpace = Value & 0xFFFF;
  const uint8_t Level = (Value >> 16) & 0x1F;

  const auto PushValue = [&](IR::OpSize Size, Ref Src) -> Ref {
    auto OldSP = LoadGPRRegister(X86State::REG_RSP);
    auto NewSP = _Push(GPRSize, Size, Src, OldSP);

    // Store the new stack pointer
    StoreGPRRegister(X86State::REG_RSP, NewSP);
    return NewSP;
  };

  auto OldBP = LoadGPRRegister(X86State::REG_RBP);
  auto NewSP = PushValue(OperandSize, OldBP);
  auto temp_RBP = NewSP;

  if (Level > 0) {
    for (uint8_t i = 1; i < Level; ++i) {
      auto MemLoc = Sub(GPRSize, OldBP, i * IR::OpSizeToSize(OperandSize));
      auto Mem = _LoadMem(GPRClass, OperandSize, MemLoc, OperandSize);
      NewSP = PushValue(OperandSize, Mem);
    }
    NewSP = PushValue(OperandSize, temp_RBP);
  }
  NewSP = Sub(GPRSize, NewSP, AllocSpace);
  StoreGPRRegister(X86State::REG_RSP, NewSP);
  StoreGPRRegister(X86State::REG_RBP, temp_RBP);
}

void OpDispatchBuilder::SGDTOp(OpcodeArgs) {
  auto DestAddress = LoadSource(GPRClass, Op, Op->Dest, Op->Flags, {.LoadData = false});