public InstructionLogicResult Execute(CPU cpu, AddrModeCalcResult addrModeCalcResult)
{
cpu.A = cpu.Y;
BinaryArithmeticHelpers.SetFlagsAfterRegisterLoadIncDec(cpu.A, cpu.ProcessorStatus);
return(InstructionLogicResult.WithNoExtraCycles());
}
public InstructionLogicResult Execute(CPU cpu, AddrModeCalcResult addrModeCalcResult)
{
// Assume Accumulator mode
cpu.A = BinaryArithmeticHelpers.PerformRORAndSetStatusRegisters(cpu.A, cpu.ProcessorStatus);
return(InstructionLogicResult.WithNoExtraCycles());
}
public InstructionLogicResult ExecuteWithStack(CPU cpu, Memory mem, AddrModeCalcResult addrModeCalcResult)
{
cpu.A = cpu.PopByteFromStack(mem);
BinaryArithmeticHelpers.SetFlagsAfterRegisterLoadIncDec(cpu.A, cpu.ProcessorStatus);
return InstructionLogicResult.WithNoExtraCycles();
}
public InstructionLogicResult Execute(CPU cpu, AddrModeCalcResult addrModeCalcResult)
{
// Assume implied mode
cpu.X++;
BinaryArithmeticHelpers.SetFlagsAfterRegisterLoadIncDec(cpu.X, cpu.ProcessorStatus);
return InstructionLogicResult.WithNoExtraCycles();
}
public InstructionLogicResult ExecuteWithByte(CPU cpu, Memory mem, byte value, AddrModeCalcResult addrModeCalcResult)
{
value--;
cpu.StoreByte(value, mem, addrModeCalcResult.InsAddress.Value);
BinaryArithmeticHelpers.SetFlagsAfterRegisterLoadIncDec(value, cpu.ProcessorStatus);
return(InstructionLogicResult.WithNoExtraCycles());
}
public InstructionLogicResult ExecuteWithWord(CPU cpu, Memory mem, ushort address, AddrModeCalcResult addrModeCalcResult)
{
var tempValue = cpu.FetchByte(mem, address);
tempValue = BinaryArithmeticHelpers.PerformRORAndSetStatusRegisters(tempValue, cpu.ProcessorStatus);
cpu.StoreByte(tempValue, mem, address);
return(InstructionLogicResult.WithNoExtraCycles());
}
public InstructionLogicResult ExecuteWithByte(CPU cpu, Memory mem, byte value, AddrModeCalcResult addrModeCalcResult)
{
BinaryArithmeticHelpers.SetFlagsAfterCompare(cpu.A, value, cpu.ProcessorStatus);
return(InstructionLogicResult.WithExtraCycles(
InstructionExtraCyclesCalculator.CalculateExtraCycles(
addrModeCalcResult.OpCode.AddressingMode,
addrModeCalcResult.AddressCalculationCrossedPageBoundary)
));
}
public InstructionLogicResult ExecuteWithByte(CPU cpu, Memory mem, byte value, AddrModeCalcResult addrModeCalcResult)
{
BinaryArithmeticHelpers.SetFlagsAfterCompare(cpu.X, value, cpu.ProcessorStatus);
return(InstructionLogicResult.WithNoExtraCycles());
}
public InstructionLogicResult ExecuteWithByte(CPU cpu, Memory mem, byte value, AddrModeCalcResult addrModeCalcResult)
{
BinaryArithmeticHelpers.PerformBITAndSetStatusRegisters(cpu.A, value, cpu.ProcessorStatus);
return(InstructionLogicResult.WithNoExtraCycles());
}
