public void EnterTriad(GBASMParser.TriadContext context)
{
PrintLine("Triad Detected");
argFSM = ArgFSM.SRC;
currentInst.op = Instruction.MapOp(context.GetText());
}
public void EnterValue(GBASMParser.ValueContext context)
{
PrintLine("Numeric Value");
String s = context.GetText();
PrintLine(s);
Int16 value = (Int16)ParseNum(s);
if (isReptArg)
{
isReptArg = false;
rep_stack.Peek().reps = value-1; //Offset for the fact the original code will be copied
}
else if (isSectionArg)
{
isSectionArg = false;
sec_stack.Peek().size = value;
}
else
{
if (db_stack > 0)
{
RomPush(context, (Byte)value);
}
else
{
if (Math.Abs(value) > 255)
{
SetArgLoc(Locations.WIDE_IMM);
}
else
{
SetArgLoc(Locations.IMM);
}
SetArgVal(value);
}
}
}
public void EnterRegister(GBASMParser.RegisterContext context)
{
PrintLine("Register");
LocationInfo l = GetCurrentArg();
l.isReg = true;
String target = context.GetText();
SetArgLoc(ParseLocation(target));
if(target == "HL+" || target == "HLI")
{
currentInst.op = Instructions.LDI;
}
if (target == "HL-" || target == "HLD")
{
currentInst.op = Instructions.LDD;
}
}
public void EnterString_data(GBASMParser.String_dataContext context)
{
PrintLine("Literal Value");
if (db_stack > 0)
{
String s = context.GetText();
//Remove quotations
for (int i = 1; i < s.Length-1; ++i)
{
RomPush(context, (Byte)s[i]);
}
}
}
public void EnterNegvalue(GBASMParser.NegvalueContext context)
{
PrintLine("Signed Value");
Int16 value = (Int16)(-ParseNum(context.GetText().Substring(1)));
if (db_stack > 0)
{
RomPush(context, (Byte)value);
}
else
{
if (Math.Abs(value) > 127)
{
SetArgLoc(Locations.WIDE_IMM);
}
else
{
SetArgLoc(Locations.IMM);
}
SetArgVal(value);
}
}
public void EnterMonad(GBASMParser.MonadContext context)
{
PrintLine("Monad Detected");
argFSM = ArgFSM.COMPLETE;
currentInst.op = Instruction.MapOp(context.GetText());
currentInst.src.loc = Locations.NONE;
currentInst.dst.loc = Locations.NONE;
}
public void EnterLabel(GBASMParser.LabelContext context)
{
PrintLine("Label Defined");
String label = context.GetText();
label = label.Substring(0, label.Length - 1); //Chop the colon
jumpAddressIndex.Add(label, rom.Count);
if(unProcessedJumpLabels.ContainsKey(label))
{
foreach(LabelInfo info in unProcessedJumpLabels[label])
{
ResolveLabel(jumpAddressIndex[label], info);
}
}
}
public void EnterJump(GBASMParser.JumpContext context)
{
PrintLine("Label Dereference");
String label = context.GetText();
LabelInfo l = new LabelInfo();
OffsetInfo o;
l.startByte = rom.Count;
l.isRelative = currentInst.op == Instructions.JR;
o = currentInst.GetCurrentOffset();
l.labelOffset = l.startByte + o.total; //This will be 0 if no src is encoded
l.endByte = l.labelOffset + ((l.isRelative) ? 1 : 2);
l.byteStringIndex = byteLines.Count;
if (jumpAddressIndex.ContainsKey(label))
{
SetArgVal((Int16)ComputeJump(jumpAddressIndex[label], l));
}
else
{
SetArgVal(0);
//CALCULATE SPACE REQUIRED
if(!unProcessedJumpLabels.ContainsKey(label))
{
unProcessedJumpLabels.Add(label, new List<LabelInfo>());
}
//An arg size of NONE should not effect current address calculations
//SRC should always be set before DST is set
unProcessedJumpLabels[label].Add(l);
}
switch (currentInst.op)
{
case Instructions.JR:
SetArgLoc(Locations.IMM);
break;
case Instructions.JP:
default:
SetArgLoc(Locations.WIDE_IMM);
break;
}
}
public void EnterFlag(GBASMParser.FlagContext context)
{
PrintLine("Flag");
LocationInfo l = GetCurrentArg();
l.isFlag = true;
switch (context.GetText())
{
case "Z":
SetArgLoc(Locations.Z);
break;
case "C":
SetArgLoc(Locations.C);
break;
case "NZ":
SetArgLoc(Locations.NZ);
break;
case "NC":
SetArgLoc(Locations.NC);
break;
default:
break;
}
}