public static List <String> ParseFile(string file, ref List <FileParserException> fpx, int desiredMifSize)
{
InstructionParser iParse = new InstructionParser();
Dictionary <string, int> SubroutineTable = new Dictionary <string, int>();
List <SRCInstruction> instructionsToReparse = new List <SRCInstruction>();
List <String> outList = new List <string>();
int memoryLocation = 0;
string[] inputFile = File.ReadAllLines(file);
for (int i = 0; i < inputFile.Length; i++)
{
string trimmed = TrimWhiteSpace(inputFile[i].Split(';')[0].Trim());
string result = "";
if (trimmed.ToLower().StartsWith("org"))
{
try
{
//memory origin designation
string memLoc = trimmed.ToLower().Split(' ')[1];
int actualLoc = 0;
if (memLoc.StartsWith("$"))
{
memLoc = memLoc.TrimStart('$');
actualLoc = Convert.ToInt32(memLoc, 16);
}
else if (memLoc.StartsWith("0x"))
{
actualLoc = Convert.ToInt32(memLoc, 16);
}
else
{
actualLoc = Convert.ToInt32(memLoc);
}
if (actualLoc == memoryLocation)
{
fpx.Add(new FileParserException("Ignoring org directive '" + trimmed + "' : Erroneous.", i, 1));
}
else if (actualLoc < memoryLocation)
{
fpx.Add(new FileParserException("Ignoring org directive '" + trimmed + "' : Can't go backwards in memory.", i, 1));
}
else if (actualLoc - 1 == memoryLocation)
{
StringBuilder s = new StringBuilder();
s.AppendFormat("{0} : 00000000;", String.Format("{0:X}", actualLoc - 1));
result = s.ToString();
outList.Add(result);
memoryLocation = actualLoc;
}
else
{
StringBuilder s = new StringBuilder();
s.AppendFormat("[{0}..{1}] : 00000000;", String.Format("{0:X}", memoryLocation), String.Format("{0:X}", actualLoc - 1));
result = s.ToString();
outList.Add(result);
memoryLocation = actualLoc;
}
}
catch (Exception ex)
{
fpx.Add(new FileParserException("Error parsing org directive '" + trimmed + "' : " + ex.Message, i, 0));
}
}
else if (trimmed.StartsWith("@"))//subroutine
{
SubroutineTable.Add(trimmed, memoryLocation);
fpx.Add(new FileParserException("Subroutine Found at location " + String.Format("{0:X}", memoryLocation) + " '" + trimmed + "'", i, 2));
}
else if (trimmed.StartsWith("&"))//data spec
{
string[] dataItems = trimmed.Remove(0, 1).Replace(' ', ',').Split(',');
for (int j = 0; j < dataItems.Length; j++)
{
string dataItem;
try
{
if (dataItems[j].StartsWith("$"))
{
dataItem = dataItems[j].TrimStart('$');
dataItem = Convert.ToInt32(dataItem, 16).ToString("X");
}
else if (dataItems[j].ToLower().StartsWith("0x"))
{
dataItem = Convert.ToInt32(dataItems[j], 16).ToString("X");
}
else
{
dataItem = Convert.ToInt32(dataItems[j]).ToString("X");
}
StringBuilder s = new StringBuilder();
s.AppendFormat("{0} : {1};", String.Format("{0:X}", memoryLocation++), dataItem);
result = s.ToString();
outList.Add(result);
}
catch (Exception ex)
{
fpx.Add(new FileParserException("Error parsing data item '" + dataItems[j] + "' : " + ex.Message, i, 0));
throw;
}
}
}
else if (String.IsNullOrWhiteSpace(trimmed))
{
//do nothing- this is a comment or other such line
}
else
{
//intsruction! Yay!
try
{
SRCInstruction outputInst = iParse.ParseInstruction(trimmed);
StringBuilder s = new StringBuilder();
if (outputInst.replaceImmediateWithAddress)
{
//... do this
instructionsToReparse.Add(outputInst);
int instructionIdx = instructionsToReparse.Count - 1;
s.AppendFormat("{0} : REPARSEINSTRUCTION_{1};", String.Format("{0:X}", memoryLocation++), instructionIdx);
}
else
{
string tmpResult = outputInst.outputInstructionString.PadLeft(8, '0');
s.AppendFormat("{0} : {1};", String.Format("{0:X}", memoryLocation++), tmpResult);
}
result = s.ToString();
outList.Add(result);
}
catch (Exception ex)
{
fpx.Add(new FileParserException("Error parsing instruction '" + trimmed + "' : " + ex.Message, i, 0));
}
}
}
//return outList;
//loop thru outList and find the memory locations to replace....
for (int i = 0; i < outList.Count; i++)
{
if (outList[i].Contains("REPARSEINSTRUCTION"))
{
//we gotta reparse this shit!
string reparseMarker = outList[i].Split(':')[1].Trim(' ').Trim(';');
int reparseIdx = Convert.ToInt32(reparseMarker.Split('_')[1]);
SRCInstruction reparseInst = instructionsToReparse[reparseIdx];
try
{
string replacementMemoryLocation = "0x" + SubroutineTable[reparseInst.immediateToReplace].ToString("X");
string replacementInstruction = reparseInst.originalInstructionString.Replace(reparseInst.immediateToReplace, replacementMemoryLocation);
SRCInstruction newInstruction = iParse.ParseInstruction(replacementInstruction);
string tmpResult = newInstruction.outputInstructionString.PadLeft(8, '0');
outList[i] = outList[i].Replace(reparseMarker, tmpResult);
}
catch (Exception ex)
{
fpx.Add(new FileParserException("Error parsing instruction (2nd pass)'" + outList[i] + "' : " + ex.Message, i, 0));
}
}
}
int pow = 0;
while (desiredMifSize > (int)Math.Pow(2, pow))
{
pow = pow + 1;
}
if (desiredMifSize < (int)Math.Pow(2, pow))
{
desiredMifSize = (int)Math.Pow(2, pow);
fpx.Add(new FileParserException("MIF extended to a power of two length.", 0, 2));
}
if (memoryLocation < desiredMifSize - 1)
{
StringBuilder s = new StringBuilder();
s.AppendFormat("[{0}..{1}] : 00000000;", String.Format("{0:X}", memoryLocation), String.Format("{0:X}", desiredMifSize - 1));
outList.Add(s.ToString());
memoryLocation = desiredMifSize;
}
else if (memoryLocation > desiredMifSize - 1)
{
while (desiredMifSize - 1 < memoryLocation)
{
pow = pow + 1;
desiredMifSize = (int)Math.Pow(2, pow);
}
if (memoryLocation == desiredMifSize - 1)
{
StringBuilder s = new StringBuilder();
s.AppendFormat("{0} : 00000000;", String.Format(String.Format("{0:X}", desiredMifSize - 1)));
outList.Add(s.ToString());
memoryLocation = desiredMifSize;
}
else
{
StringBuilder s = new StringBuilder();
s.AppendFormat("[{0}..{1}] : 00000000;", String.Format("{0:X}", memoryLocation), String.Format("{0:X}", desiredMifSize - 1));
outList.Add(s.ToString());
memoryLocation = desiredMifSize;
}
fpx.Add(new FileParserException("MIF extended to accommodate code length", 0, 2));
}
List <string> FileOutList = new List <string>();
FileOutList.Add("WIDTH=32;");
FileOutList.Add("DEPTH=" + Convert.ToString((int)Math.Pow(2, pow)) + ";");
FileOutList.Add("ADDRESS_RADIX=HEX;");
FileOutList.Add("DATA_RADIX=HEX;");
FileOutList.Add("");
FileOutList.Add("CONTENT BEGIN");
FileOutList.AddRange(outList);
FileOutList.Add("END;");
return(FileOutList);
}
public SRCInstruction ParseInstruction(string inst)
{
SRCInstruction tmpInst = new SRCInstruction();
tmpInst.originalInstructionString = inst;
tmpInst.outputInstructionString = "";
tmpInst.replaceImmediateWithAddress = false;
string instruction = inst.ToLower();
if (instruction == "nop")
{
tmpInst.outputInstructionString = "C8000000";
return(tmpInst); //opcode for NOP
}
else if (instruction == "halt")
{
tmpInst.outputInstructionString = "D0000000"; //opcode for HALT!
return(tmpInst);
}
else //not a single word no operand instruction
{
string[] wsplit = inst.ToLower().Split(' ');
StringBuilder s = new StringBuilder();
s.Append(opcodeDictionary[wsplit[0]]);
try
{
switch (wsplit[0])
{
case "ld":
case "ldi":
{
string regString;
if (wsplit.Length > 2)
{
regString = (wsplit[1] + wsplit[2]);
if (wsplit.Length > 3)
{
//dump warning
}
}
else
{
regString = wsplit[1];
}
Regex idx = new Regex(@"(([rR][0-9]*),\s*[$|0x|0X|-]*[0-9]+\(([rR][0-9]+)\))\s*");
Regex reg = new Regex(@"([rR][0-9]*),\s*[$|0x|0X|-]*[0-9]+\s*");
Regex sub = new Regex(@"([rR][0-9]*),\s*[\@][a-zA-Z0-9]+\s*"); //will match an @ declaration.... this should be good
if (idx.IsMatch(regString))
{
string[] dirString = regString.Split(',');
string[] addString = dirString[1].Split('(');
s.AppendFormat("{0}", RxToBin(FileParser.TrimWhiteSpace(dirString[0])));
s.AppendFormat("{0}", RxToBin(FileParser.TrimWhiteSpace(addString[1].TrimEnd(')'))));
string immString = FileParser.TrimWhiteSpace(addString[0]);
int c_sx = 0;
string c_sx_string = "";
if (immString.StartsWith("$"))
{
immString = immString.Remove(0, 1);
c_sx = Convert.ToInt32(immString, 16);
}
else if (immString.ToLower().StartsWith("0x"))
{
c_sx = Convert.ToInt32(immString, 16);
}
else
{
c_sx = Convert.ToInt32(immString);
}
if (c_sx < -524288 || c_sx > 524287)
{
throw new ArgumentOutOfRangeException("Immediate Value out of range.");
}
else
{
c_sx_string = String.Format(Convert.ToString(c_sx, 2)).PadLeft(19, '0');
if (c_sx_string.Length > 19) //remove erroneous 1s
{
c_sx_string = c_sx_string.Substring(c_sx_string.Length - 19, 19);
}
}
s.AppendFormat("{0}", c_sx_string);
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString(), 2).ToString("X");
return(tmpInst);
}
else if (reg.IsMatch(regString))
{
string[] dirString = regString.Split(',');
s.AppendFormat("{0}0000", RxToBin(FileParser.TrimWhiteSpace(dirString[0])));
string immString = FileParser.TrimWhiteSpace(dirString[1]);
int c_sx = 0;
string c_sx_string = "";
if (immString.StartsWith("$"))
{
immString = immString.Remove(0, 1);
c_sx = Convert.ToInt32(immString, 16);
}
else if (immString.ToLower().StartsWith("0x"))
{
c_sx = Convert.ToInt32(immString, 16);
}
else
{
c_sx = Convert.ToInt32(immString);
}
if (c_sx < -524288 || c_sx > 524287)
{
throw new ArgumentOutOfRangeException("Immediate Value out of range.");
}
else
{
c_sx_string = String.Format(Convert.ToString(c_sx, 2)).PadLeft(19, '0');
if (c_sx_string.Length > 19) //remove erroneous 1s
{
c_sx_string = c_sx_string.Substring(c_sx_string.Length - 19, 19);
}
}
s.AppendFormat("{0}", c_sx_string);
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString(), 2).ToString("X");
return(tmpInst);
}
else if (sub.IsMatch(regString))
{
//we're matching a subroutine. save this for later.
string[] dirString = regString.Split(',');
tmpInst.immediateToReplace = dirString[1];
tmpInst.replaceImmediateWithAddress = true;
return(tmpInst);
}
else
{
throw new ArgumentException("Syntax Error in '" + inst + "' : invalid instruction format.");
}
}
case "st":
{
string regString;
if (wsplit.Length > 2)
{
regString = (wsplit[1] + wsplit[2]);
if (wsplit.Length > 3)
{
//dump warning
}
}
else
{
regString = wsplit[1];
}
Regex idx = new Regex(@"[$|0x|0X|-]([0-9]*[a-f|A-F]*)*\([rR][0-9]+\)\s*,\s*[rR][0-9]+");
Regex reg = new Regex(@"[$|0x|0X|-]*[0-9]+\s*,\s*[rR][0-9]+\s*");
if (idx.IsMatch(regString))
{
string[] dirString = regString.Split(',');
string[] addString = dirString[0].Split('(');
s.AppendFormat("{0}", RxToBin(FileParser.TrimWhiteSpace(dirString[1])));
s.AppendFormat("{0}", RxToBin(FileParser.TrimWhiteSpace(addString[1].TrimEnd(')'))));
string immString = FileParser.TrimWhiteSpace(addString[0]);
int c_sx = 0;
string c_sx_string = "";
if (immString.StartsWith("$"))
{
immString = immString.Remove(0, 1);
c_sx = Convert.ToInt32(immString, 16);
}
else if (immString.ToLower().StartsWith("0x"))
{
c_sx = Convert.ToInt32(immString, 16);
}
else
{
c_sx = Convert.ToInt32(immString);
}
if (c_sx < -524288 || c_sx > 524287)
{
throw new ArgumentOutOfRangeException("Immediate Value out of range.");
}
else
{
c_sx_string = String.Format(Convert.ToString(c_sx, 2)).PadLeft(19, '0');
if (c_sx_string.Length > 19) //remove erroneous 1s
{
c_sx_string = c_sx_string.Substring(c_sx_string.Length - 19, 19);
}
}
s.AppendFormat("{0}", c_sx_string);
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString(), 2).ToString("X");
return(tmpInst);
}
else if (reg.IsMatch(regString))
{
string[] dirString = regString.Split(',');
s.AppendFormat("{0}0000", RxToBin(FileParser.TrimWhiteSpace(dirString[1])));
string immString = FileParser.TrimWhiteSpace(dirString[0]);
int c_sx = 0;
string c_sx_string = "";
if (immString.StartsWith("$"))
{
immString = immString.Remove(0, 1);
c_sx = Convert.ToInt32(immString, 16);
}
else if (immString.ToLower().StartsWith("0x"))
{
c_sx = Convert.ToInt32(immString, 16);
}
else
{
c_sx = Convert.ToInt32(immString);
}
if (c_sx < -524288 || c_sx > 524287)
{
throw new ArgumentOutOfRangeException("Immediate Value out of range.");
}
else
{
c_sx_string = String.Format(Convert.ToString(c_sx, 2)).PadLeft(19, '0');
if (c_sx_string.Length > 19) //remove erroneous 1s
{
c_sx_string = c_sx_string.Substring(c_sx_string.Length - 19, 19);
}
}
s.AppendFormat("{0}", c_sx_string);
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString(), 2).ToString("X");
return(tmpInst);
}
else
{
throw new ArgumentException("Syntax Error in '" + inst + "' : invalid instruction format.");
}
}
//operation,register instructions
case "jal":
case "jr":
case "mflo":
case "mfhi":
case "in":
case "out":
{
if (wsplit.Length > 2)
{
//dump warning here
}
s.Append(RxToBin(wsplit[1]));
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString().PadRight(32, '0'), 2).ToString("X");
return(tmpInst);
}
//operation, three registers, no immediate value
case "add":
case "sub":
case "and":
case "or":
case "shr":
case "shl":
case "ror":
case "rol":
{
string[] regString;
if (wsplit.Length > 3)
{
regString = (wsplit[1] + wsplit[2] + wsplit[3]).Split(',');
if (wsplit.Length > 4)
{
//dump warning
}
}
else if (wsplit.Length > 2)
{
regString = (wsplit[1] + wsplit[2]).Split(',');
}
else
{
regString = wsplit[1].Split(',');
}
s.AppendFormat("{0}{1}{2}", RxToBin(FileParser.TrimWhiteSpace(regString[0])), RxToBin(FileParser.TrimWhiteSpace(regString[1])), RxToBin(FileParser.TrimWhiteSpace(regString[2])));
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString().PadRight(32, '0'), 2).ToString("X");
return(tmpInst);
}
//operation, two registers, immediate value
case "addi":
case "andi":
case "ori":
{
string[] regString;
if (wsplit.Length > 3)
{
regString = (wsplit[1] + wsplit[2] + wsplit[3]).Split(',');
if (wsplit.Length > 4)
{
//dump warning
}
}
else if (wsplit.Length > 2)
{
regString = (wsplit[1] + wsplit[2]).Split(',');
}
else
{
regString = wsplit[1].Split(',');
}
s.AppendFormat("{0}{1}", RxToBin(FileParser.TrimWhiteSpace(regString[0])), RxToBin(FileParser.TrimWhiteSpace(regString[1])));
string immString = FileParser.TrimWhiteSpace(regString[2]);
int c_sx = 0;
string c_sx_string = "";
if (immString.StartsWith("$"))
{
immString = immString.Remove(0, 1);
c_sx = Convert.ToInt32(immString, 16);
}
else if (immString.ToLower().StartsWith("0x"))
{
c_sx = Convert.ToInt32(immString, 16);
}
else
{
c_sx = Convert.ToInt32(immString);
}
if (c_sx < -524288 || c_sx > 524287)
{
throw new ArgumentOutOfRangeException("Immediate Value out of range.");
}
else
{
c_sx_string = String.Format(Convert.ToString(c_sx, 2)).PadLeft(19, '0');
if (c_sx_string.Length > 19) //remove erroneous 1s
{
c_sx_string = c_sx_string.Substring(c_sx_string.Length - 19, 19);
}
}
s.AppendFormat("{0}", c_sx_string);
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString(), 2).ToString("X");
return(tmpInst);
}
//operation, two registers, nothing else
case "not":
case "neg":
case "div":
case "mul":
{
string[] regString;
if (wsplit.Length > 2)
{
regString = (wsplit[1] + wsplit[2]).Split(',');
if (wsplit.Length > 3)
{
//dump warning
}
}
else
{
regString = wsplit[1].Split(',');
}
s.AppendFormat("{0}{1}", RxToBin(FileParser.TrimWhiteSpace(regString[0])), RxToBin(FileParser.TrimWhiteSpace(regString[1])));
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString().PadRight(32, '0'), 2).ToString("X");
return(tmpInst);
}
//branches
case "brzr":
case "brnz":
case "brpl":
case "brmi":
{
string[] regString;
if (wsplit.Length > 2)
{
regString = (wsplit[1] + wsplit[2]).Split(',');
if (wsplit.Length > 3)
{
//dump warning
}
}
else
{
regString = wsplit[1].Split(',');
}
s.AppendFormat("{0}{1}", RxToBin(FileParser.TrimWhiteSpace(regString[0])), "00");
s.Append(branchSuffix[wsplit[0]]);
// Constant added to end
string immString = FileParser.TrimWhiteSpace(regString[1]);
int c_sx = 0;
string c_sx_string = "";
if (immString.StartsWith("$"))
{
immString = immString.Remove(0, 1);
c_sx = Convert.ToInt32(immString, 16);
}
else if (immString.ToLower().StartsWith("0x"))
{
c_sx = Convert.ToInt32(immString, 16);
}
else
{
c_sx = Convert.ToInt32(immString);
}
if (c_sx < -524288 || c_sx > 524287)
{
throw new ArgumentOutOfRangeException("Immediate Value out of range.");
}
else
{
c_sx_string = String.Format(Convert.ToString(c_sx, 2)).PadLeft(19, '0');
if (c_sx_string.Length > 19) //remove erroneous 1s
{
c_sx_string = c_sx_string.Substring(c_sx_string.Length - 19, 19);
}
}
s.AppendFormat("{0}", c_sx_string);
tmpInst.outputInstructionString = Convert.ToUInt32(s.ToString(), 2).ToString("X");
return(tmpInst);
}
default:
{
throw new ArgumentException("Unknown instruction: " + wsplit[0]);
}
}
}
catch (IndexOutOfRangeException)
{
throw new ArgumentException("Syntax Error, argument(s) are missing from '" + inst + "'");
}
}
}
