private void UpdateCarryFlag(CarryFlagAffect flagAffect, byte initialValue, byte newValue)
{
switch (flagAffect)
{
case CarryFlagAffect.UNAFFECTED:
break;
case CarryFlagAffect.SET_IF_BORROW:
flags.CarryFlag = (newValue > initialValue);
break;
case CarryFlagAffect.SET_IF_CARRY:
flags.CarryFlag = (newValue < initialValue);
break;
case CarryFlagAffect.SET:
flags.CarryFlag = true;
break;
case CarryFlagAffect.RESET:
flags.CarryFlag = false;
break;
}
}
private void UpdateHalfCarryFlag(CarryFlagAffect flagAffect, byte initialValue, byte newValue)
{
switch (flagAffect)
{
case CarryFlagAffect.UNAFFECTED:
break;
case CarryFlagAffect.SET_IF_BORROW:
flags.HalfCarryFlag = ((initialValue & 0xf0) > ((newValue - initialValue) & 0xf0));
break;
case CarryFlagAffect.SET_IF_CARRY:
flags.HalfCarryFlag = ((initialValue & 0x0f) + ((newValue - initialValue) & 0x0f)) > 0x0f;
break;
case CarryFlagAffect.SET:
flags.HalfCarryFlag = true;
break;
case CarryFlagAffect.RESET:
flags.HalfCarryFlag = false;
break;
}
}
