public DataAccess(ECondition condition, bool load, bool preIndex, bool unsigned, bool writeBack, EDataSize dataSize, ERegister rn, ERegister rd, short immediate)
{
Offset = EOffset.Immediate;
Condition = condition;
Load = load;
PreIndex = preIndex;
Up = unsigned;
WriteBack = writeBack;
DataSize = dataSize;
Rn = rn;
Rd = rd;
Immediate = immediate;
Decoded = true;
Linked = true;
}
public DataAccess(ECondition condition, bool load, bool preIndex, bool unsigned, bool writeBack, EDataSize dataSize, ERegister rn, ERegister rd, byte shiftCount, EShiftInstruction shiftInst, ERegister rm)
{
Offset = EOffset.ImmediateShiftRm;
Condition = condition;
Load = load;
PreIndex = preIndex;
Up = unsigned;
WriteBack = writeBack;
DataSize = dataSize;
Rn = rn;
Rd = rd;
ShiftCount = shiftCount;
ShiftInst = shiftInst;
Rm = rm;
Decoded = true;
Linked = true;
}
// Preindex!
private void ParseSource([NotNull] string sourceString)
{
var source = sourceString.Split(',');
if (source.Length > 3)
{
throw new TargetParameterCountException();
}
Rn = Parser.ParseRegister(source[0]);
if (source.Length == 1)
{
return;
}
// User wants to use an immediate offset
if (source[1].StartsWith("#", StringComparison.Ordinal))
{
Immediate = Parser.ParseImmediate <short>(source[1]);
if (Immediate < 0)
{
Up = false;
Immediate *= -1;
}
if (Immediate > 4096)
{
throw new ArgumentOutOfRangeException();
}
Offset = EOffset.Immediate;
}
// User wants to use a register value offset
else
{
Rm = Parser.ParseRegister(source[1]);
if (source.Length > 2)
{
Parser.ParseShiftInstruction(source[2], ref ShiftInst, ref ShiftCount);
}
Offset = EOffset.ImmediateShiftRm;
}
}