public void Assemble(IEnumerable <string> code)
{
foreach (var lineOfCode in code)
{
if (string.IsNullOrWhiteSpace(lineOfCode))
{
continue;
}
Statement statement = null;
if (!lineOfCode.Trim().StartsWith(":")) //TODO:Refactor
{
statement = interpreter.Interpret(lineOfCode);
}
if (lineOfCode.Trim().StartsWith(":"))
{
string label = lineOfCode.Trim().TrimStart(new[] { ':' }).ToUpper();
if (labelAddressTable.ContainsKey(label))
{
throw new ArgumentException("Dupe Label");
}
labelAddressTable.Add(label, dump.Count);
//Fix Labelling
IEnumerable <int> value;
if (labelIndexTable.TryGetValue(label, out value))
{
int labelAddress = dump.Count;
foreach (int ind in value)
{
dump[ind] = (ushort)labelAddress;
}
}
}
else if (statement != null && statement.Instruction == Ins.DAT)
{
AddData(lineOfCode);
}
else if (statement != null &&
(statement.OperandA is RegisterOperand && statement.OperandB is RegisterOperand))
{
//Instruction is 1 word long
if (statement.OperandA.ReferencedAddress() == -1 && statement.OperandB.ReferencedAddress() == -1)
{
ushort fullOpCode = PackOpCode(statement);
dump.Add(fullOpCode);
}
else
{
Future();
}
}
else if (statement != null &&
(statement.OperandA is WordOperand && 32 <= statement.OperandA.ReferencedAddress() &&
statement.OperandA.ReferencedAddress() <= 63 && statement.OperandB is RegisterOperand))
{
//Instruction is 1 word long
// 0x20-0x3f | literal value 0xffff-0x1e (-1..30) (literal) (only for a)
int refAddress = statement.OperandA.ReferencedAddress();
ushort fullOpCode = PackOpCode((ushort)statement.Instruction, (ushort)refAddress,
statement.OperandB.ToOpcode());
dump.Add(fullOpCode);
}
else if (statement != null &&
(statement.OperandA is WordOperand && statement.OperandB is RegisterOperand))
{
//Instruction is 2 words long
int refAddress = statement.OperandA.ReferencedAddress();
ushort partialOpCode = PackOpCode(statement);
dump.Add(partialOpCode);
dump.Add((ushort)refAddress);
}
else if (statement != null && statement.OperandA is LabelOperand)
{
//Instruction is 2 words long
var labelOperand = statement.OperandA as LabelOperand;
int labelAddress;
if (labelAddressTable.TryGetValue(labelOperand.LabelName, out labelAddress))
{
labelOperand.Address = labelAddress;
}
else
{
labelOperand.Address = 0x0000;
}
ushort partialOpcode = PackOpCode((ushort)statement.Instruction,
(ushort)WordOps.NXT_WORD,
statement.OperandB.ToOpcode());
dump.Add(partialOpcode);
IEnumerable <int> labelIndicesInMemory;
if (labelIndexTable.TryGetValue(labelOperand.LabelName, out labelIndicesInMemory))
{
var indices = labelIndicesInMemory;
indices = indices.Concat(new[] { dump.Count });
labelIndexTable[labelOperand.LabelName] = indices.ToList();
}
else
{
labelIndexTable.Add(labelOperand.LabelName, new List <int> {
dump.Count
});
}
dump.Add((ushort)labelOperand.Address);
}
else
{
Future();
}
}
}
public void Test_for_lower_case()
{
string code = "set A,B";
var statement = li.Interpret(code);
Assert.AreEqual(Ins.SET, statement.Instruction);
}
