void Interpreter::JME(const Instruction & instruction)
{
UInt16 xVal = mCPU.DumpRegister(instruction.GetFirstOperand());
UInt16 yVal = mCPU.DumpRegister(instruction.GetSecondOperand());
if(xVal == yVal)
mErrorCode = mCPU.SetProgramCounter(instruction.GetImmediateValue());
}
void Interpreter::DirectLDM(const Instruction & instruction)
{
UInt8 addr = instruction.GetFirstOperand();
UInt16 iVal = instruction.GetImmediateValue();
UInt16 val;
mErrorCode = mCPU.Load(iVal, val);
mErrorCode |= mCPU.SetRegister(addr, val);
}
void Interpreter::ImmediateUnaryArithmetic(const Instruction & instruction,
std::function<UInt16(UInt16)> ins)
{
UInt8 reg = instruction.GetFirstOperand();
UInt16 iVal = instruction.GetImmediateValue();
mErrorCode = mCPU.SetRegister(reg, ins(iVal));
mCPU.SetSignZeroFlag(mCPU.DumpRegister(reg));
}
void Interpreter::RND(const Instruction & instruction)
{
UInt8 addr = instruction.GetFirstOperand();
UInt16 maxVal = instruction.GetImmediateValue();
UInt16 randVal = mDist(mRandEngine);
while(randVal > maxVal)
randVal= mDist(mRandEngine);
mErrorCode = mCPU.SetRegister(addr, randVal);
}
void Interpreter::Cx(const Instruction & instruction)
{
UInt8 condCode = instruction.GetFirstOperand();
if(InterpretConditions(condCode))
{
mErrorCode = mCPU.PushPC();
mErrorCode |= mCPU.SetProgramCounter(instruction.GetImmediateValue());
}
}
void Interpreter::DiscardImmediateBinaryArithmetic(const Instruction & instruction,
std::function<UInt16(UInt16,UInt16)> ins,
std::function<void(UInt16,UInt16)> frh)
{
UInt16 xVal = mCPU.DumpRegister(instruction.GetFirstOperand());
UInt16 iVal = instruction.GetImmediateValue();
if (frh)
frh(xVal, iVal);
UInt16 result = ins(xVal, iVal);
mCPU.SetSignZeroFlag(result);
}
void Interpreter::DirectSTM(const Instruction & instruction)
{
UInt8 regAddr = instruction.GetFirstOperand();
UInt16 memAddr = instruction.GetImmediateValue();
mErrorCode = mCPU.Store(memAddr, mCPU.DumpRegister(regAddr));
}
void Interpreter::StackLDI(const Instruction & instruction)
{
mErrorCode = mCPU.SetStackPointer(instruction.GetImmediateValue());
}
void Interpreter::RegisterLDI(const Instruction & instruction)
{
mErrorCode = mCPU.SetRegister(instruction.GetFirstOperand(), instruction.GetImmediateValue());
}
void Interpreter::DirectCALL(const Instruction & instruction)
{
mErrorCode = mCPU.PushPC();
mErrorCode |= mCPU.SetProgramCounter(instruction.GetImmediateValue());
}
void Interpreter::Jx(const Instruction & instruction)
{
UInt8 condCode = instruction.GetFirstOperand();
if(InterpretConditions(condCode))
mCPU.SetProgramCounter(instruction.GetImmediateValue());
}
void Interpreter::JMC(const Instruction & instruction)
{
if (mCPU.DumpFlagRegister() & CPU::UNSIGNED_CARRY_FLAG)
mErrorCode = mCPU.SetProgramCounter(instruction.GetImmediateValue());
}
void Interpreter::DirectJMP(const Instruction & instruction)
{
mErrorCode = mCPU.SetProgramCounter(instruction.GetImmediateValue());
}