public bool Evaluate(IConsoleRam ram, EvaluatorContext context)
{
if (Left == null)
{
return(false);
}
if (Right == null)
{
return(false);
}
var leftValue = Left.GetValue(ram, context);
var rightValue = Right.GetValue(ram, context);
if (context.AddValue.HasValue)
{
leftValue = context.AddValue.Value + leftValue;
context.AddValue = null;
}
return(Operation switch
{
ConditionCompare.Equals => leftValue == rightValue,
ConditionCompare.Greater => leftValue > rightValue,
ConditionCompare.GreaterEquals => leftValue >= rightValue,
ConditionCompare.Less => leftValue < rightValue,
ConditionCompare.LessEquals => leftValue <= rightValue,
ConditionCompare.NotEquals => leftValue != rightValue,
_ => false
});
public override int GetValue(IConsoleRam ram, EvaluatorContext context)
{
var current = _child.GetValue(ram, context);
var result = _previousValue;
_previousValue = current;
return(result);
}
public override int GetValue(IConsoleRam ram, EvaluatorContext context)
{
var current = _child.GetValue(ram, context);
if (_previousValue != current)
{
_priorValue = _previousValue;
}
_previousValue = current;
return(_priorValue);
}
public override int GetValue(IConsoleRam ram, EvaluatorContext context)
{
return(_constValue);
}
public abstract int GetValue(IConsoleRam ram, EvaluatorContext context);
public override int GetValue(IConsoleRam ram, EvaluatorContext context)
{
var effectiveAddress = Address;
if (context.AddAddress.HasValue)
{
effectiveAddress += context.AddAddress.Value;
context.AddAddress = null;
}
switch (Kind)
{
case MemoryAddressKind.Bit0:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 0)) >> 0);
}
case MemoryAddressKind.Bit1:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 1)) >> 1);
}
case MemoryAddressKind.Bit2:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 2)) >> 2);
}
case MemoryAddressKind.Bit3:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 3)) >> 3);
}
case MemoryAddressKind.Bit4:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 4)) >> 4);
}
case MemoryAddressKind.Bit5:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 5)) >> 5);
}
case MemoryAddressKind.Bit6:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 6)) >> 6);
}
case MemoryAddressKind.Bit7:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & (1 << 7)) >> 7);
}
case MemoryAddressKind.Lower4:
{
var value = ram.ReadInt8(effectiveAddress);
return(value & 0x0F);
}
case MemoryAddressKind.Upper4:
{
var value = ram.ReadInt8(effectiveAddress);
return((value & 0xF0) >> 4);
}
case MemoryAddressKind.Int8:
{
return(ram.ReadInt8(effectiveAddress));
}
case MemoryAddressKind.Int16:
{
return(ram.ReadInt16(effectiveAddress));
}
case MemoryAddressKind.Int24:
{
return((int)ram.ReadUInt24(effectiveAddress));
}
case MemoryAddressKind.Int32:
{
return((int)ram.ReadUInt32(effectiveAddress));
}
case MemoryAddressKind.BitCount:
{
var value = ram.ReadInt8(effectiveAddress);
return(BitOperations.PopCount(value));
}
default:
break;
}
return(0);
}
