private string DecodeDecrementedImmediate(int immedValue, int length)
{
//uint value = ASMValueHelper.BinaryToUnsigned(immedBinary) + 1;
uint value = (uint)immedValue + 1;
return("0x" + ASMValueHelper.UnsignedToHex_WithLength(value, length));
}
public ASMDecoderResult DecodeASM(IEnumerable <uint> uLines, uint pc, string spacePadding, bool includeAddress, bool useRegAliases, bool clearErrorText)
{
if (clearErrorText)
{
ClearErrorText();
}
StringBuilder sb = new StringBuilder();
foreach (uint uLine in uLines)
{
string strAddress = "[0x" + ASMValueHelper.UnsignedToHex_WithLength(pc, 8) + "] ";
string strPrefix = (includeAddress ? strAddress : "") + spacePadding;
try
{
string decodedLine = TryDecodeSingle(uLine, pc, useRegAliases);
sb.Append(strPrefix);
sb.Append(decodedLine);
sb.Append("\r\n");
pc += 4;
}
catch (Exception ex)
{
_errorTextBuilder.AppendLine("FAILED TO DECODE LINE: " + uLine.ToString("{0:X8}") + " (" + ex.Message + ")");
}
}
return(new ASMDecoderResult(sb.ToString(), _errorTextBuilder.ToString()));
}
public int DecodeASMToFile(string inputFilename, string outputFilename, bool littleEndian, bool useRegAliases, uint pc)
{
ClearErrorText();
BinaryReader reader = null;
StreamWriter writer = null;
try
{
reader = new BinaryReader(File.Open(inputFilename, FileMode.Open));
writer = new StreamWriter(outputFilename, false, Encoding.ASCII);
}
catch (Exception)
{
return(ASMFileDecoderResult.FileOpenError);
}
long length = reader.BaseStream.Length;
int result = ASMFileDecoderResult.Success;
try
{
int charPos = 0;
while (charPos < length)
{
charPos += 4;
uint line = reader.ReadUInt32();
if (!littleEndian)
{
line = ASMValueHelper.ReverseBytes(line);
}
string displayHex = ASMValueHelper.UnsignedToHex_WithLength(line, 8);
string instruction = DecodeASMSingle(line, pc, useRegAliases);
StringBuilder sb = new StringBuilder();
sb.Append(ASMValueHelper.UnsignedToHex_WithLength(pc, 8).ToLower());
sb.Append(": ");
sb.Append(displayHex);
sb.Append(" ");
sb.Append(instruction);
writer.WriteLine(sb.ToString());
pc += 4;
}
}
catch
{
result = ASMFileDecoderResult.ASMDecodeError;
}
finally
{
reader.Close();
writer.Close();
}
return(result);
}
private string DecodeJumpImmediate(int immedValue, uint pc)
{
/*
* string tempBinary = ASMValueHelper.UnsignedToBinary_WithLength(pc, 32).Substring(0,4);
* string fullBinary = tempBinary + immedBinary + "00";
* string strValue = ASMValueHelper.BinaryToHex_WithLength(fullBinary, 8).ToLower();
* return "0x" + strValue;
*/
uint uValue = (uint)((pc & 0xF0000000) + (immedValue << 2));
return("0x" + ASMValueHelper.UnsignedToHex_WithLength(uValue, 8).ToLower());
}
public string ReplaceLabelsInHex(string hex, bool littleEndian)
{
string result = hex.ToUpper();
foreach (string label in LabelDict.Keys)
{
uint labelValue = LabelToUnsigned(label);
labelValue = littleEndian ? ASMValueHelper.ReverseBytes(labelValue) : labelValue;
string labelHex = ASMValueHelper.UnsignedToHex_WithLength(labelValue, 8).ToUpper();
result = result.Replace(label, labelHex);
}
return(result);
}
private string DecodeSignedImmediate(int immedValue, int length)
{
//short immed = ASMValueHelper.BinaryToSignedShort(immedBinary);
//short immed = (short)immedValue;
//short immed = Convert.ToInt16((UInt16)immedValue);
//short immed = BitConverter.ToInt16(BitConverter.GetBytes((ushort)immedValue), 0);
ushort usValue = (ushort)immedValue;
short immed = ASMValueHelper.UnsignedShortToSignedShort(usValue);
uint uImmed = (uint)((immed < 0) ? (immed * -1) : immed);
return(((immed < 0) ? "-0x" : "0x") + ASMValueHelper.UnsignedToHex_WithLength(uImmed, length).ToLower());
}
private string DecodeBranchImmediate(int immedValue, uint pc)
{
//short difference = ASMValueHelper.BinaryToSignedShort(immedBinary);
//short difference = (short)immedValue;
//short difference = Convert.ToInt16((UInt16)immedValue);
ushort usValue = (ushort)immedValue;
short difference = ASMValueHelper.UnsignedShortToSignedShort(usValue);
//short difference = BitConverter.ToInt16(BitConverter.GetBytes(usValue), 0);
uint immed = (uint)(difference * 4 + pc + 4);
string strValue = ASMValueHelper.UnsignedToHex_WithLength(immed, 8).ToLower();
return("0x" + strValue);
}
public ASMDecoderResult DecodeASM(string hex, uint pc, string spacePadding, bool littleEndian, bool includeAddress, bool useRegAliases, bool clearErrorText)
{
if (clearErrorText)
{
ClearErrorText();
}
//string[] lines = hex.Split('\n');
//lines = ASMStringHelper.RemoveFromLines(lines, "\r");
string[] lines = ASMValueHelper.GetHexLines(hex);
StringBuilder sb = new StringBuilder();
foreach (string line in lines)
{
if (string.IsNullOrEmpty(line))
{
continue;
}
string strAddress = "[0x" + ASMValueHelper.UnsignedToHex_WithLength(pc, 8) + "] ";
string strPrefix = (includeAddress ? strAddress : "") + spacePadding;
string modLine = line.Replace(" ", "").Replace("\t", "");
try
{
uint uLine = Convert.ToUInt32(modLine, 16);
if (littleEndian)
{
uLine = ASMValueHelper.ReverseBytes(uLine);
}
string decodedLine = TryDecodeSingle(uLine, pc, useRegAliases);
sb.Append(strPrefix);
sb.Append(decodedLine);
sb.Append("\r\n");
pc += 4;
}
catch (Exception ex)
{
_errorTextBuilder.AppendLine("FAILED TO DECODE LINE: " + line + " (" + ex.Message + ")");
}
}
return(new ASMDecoderResult(sb.ToString(), _errorTextBuilder.ToString()));
}
public string ReplaceLabelsInHex(string hex, bool littleEndian, bool replaceAll = false)
{
string result = hex.ToUpper();
List <string> labels = new List <string>(LabelDict.Keys);
labels.Sort((a, b) => a.Length.CompareTo(b.Length));
labels.Reverse();
foreach (string label in labels)
{
uint labelValue = LabelToUnsigned(label);
labelValue = littleEndian ? ASMValueHelper.ReverseBytes(labelValue) : labelValue;
string labelHex = ASMValueHelper.UnsignedToHex_WithLength(labelValue, 8).ToUpper();
result = result.Replace(label, labelHex);
}
if (replaceAll)
{
int persistentLabelIndex = result.IndexOf(PersistentLabelPrefix);
HashSet <char> endChars = new HashSet <char>()
{
' ', '\t', '\r', '\n'
};
while (persistentLabelIndex != -1)
{
int endIndex = persistentLabelIndex;
for (; endIndex < result.Length; endIndex++)
{
if (endChars.Contains(result[endIndex]))
{
break;
}
}
string label = (endIndex < result.Length) ? result.Substring(persistentLabelIndex, endIndex - persistentLabelIndex) : result.Substring(persistentLabelIndex);
result = result.Replace(label, "00000000");
persistentLabelIndex = result.IndexOf(PersistentLabelPrefix);
}
}
return(result);
}
// Immediate binary in the form (previous + current - 1) converted to current: (previous + current - 1) - previous + 1 = current
private string DecodeModifiedImmediate(int immedValue, int prevImmedValue, int length)
{
//int result = (int)ASMValueHelper.BinaryToUnsigned(immedBinary) - (int)ASMValueHelper.BinaryToUnsigned(prevBinaryValue) + 1;
int result = immedValue - prevImmedValue + 1;
if (result < 0)
{
//_errorTextBuilder.Append("Negative modified immediate " + result.ToString() + " is invalid; Resulting hex is 0x" + hex);
_illegalFlag = true;
_illegalMessage = "Expected unsigned result for calculated value; negative result " + result.ToString() + " is invalid.";
return("0");
}
uint uResult = (uint)result;
string hex = ASMValueHelper.UnsignedToHex_WithLength(uResult, length);
return("0x" + hex);
//return "0x" + ASMValueHelper.UnsignedToHex_WithLength(result, 4);
}
public string ReplaceLabelsInHex(string hex, bool littleEndian)
{
string result = hex.ToUpper();
List <string> labels = new List <string>(LabelDict.Keys);
labels.Sort((a, b) => a.Length.CompareTo(b.Length));
labels.Reverse();
foreach (string label in labels)
{
uint labelValue = LabelToUnsigned(label);
labelValue = littleEndian ? ASMValueHelper.ReverseBytes(labelValue) : labelValue;
string labelHex = ASMValueHelper.UnsignedToHex_WithLength(labelValue, 8).ToUpper();
result = result.Replace(label, labelHex);
}
return(result);
}
public string LabelToHex(string label, int reqLength)
{
return(ASMValueHelper.UnsignedToHex_WithLength(LabelToUnsigned(label), reqLength));
}
public ASMCheckResult CheckASM(string[] lines, uint pc, bool littleEndian, bool useRegAliases, ICollection <ASMCheckCondition> conditions = null)
{
if (conditions == null)
{
conditions = standardCheckConditions;
}
bool isASM = (_errorTextBuilder.Length == 0);
uint startPC = pc;
string gprLoad = "";
int hiLoCountdown = 0;
string hiLoCommand = "";
bool isLastCommandBranch = false;
uint lastBranchAddress = 0;
bool isLastCommandUnconditionalJump = false;
bool isLastCommandUnconditionalJumpDelaySlot = false;
foreach (string line in lines)
{
string[] parts = ASMStringHelper.SplitLine(line);
if (parts.Length < 1)
{
continue;
}
string command = parts[0];
if (string.IsNullOrEmpty(command))
{
continue;
}
string commandLower = command.ToLower().Trim();
bool isLoad = IsLoadCommand(command);
bool isBranch = IsBranchCommand(command);
bool isUnconditionalJump = IsUnconditionalJump(command);
string strPC = "0x" + ASMValueHelper.UnsignedToHex_WithLength(pc, 8);
string strArgs = parts[1];
if (!string.IsNullOrEmpty(strArgs))
{
string[] args = strArgs.Split(',');
if (conditions.Contains(ASMCheckCondition.LoadDelay))
{
if (!isLastCommandUnconditionalJumpDelaySlot)
{
CheckLoadDelay(command, args, gprLoad, strPC);
}
}
if (conditions.Contains(ASMCheckCondition.UnalignedOffset))
{
int alignmentMultiple = GetAlignmentMultiple(command);
if (alignmentMultiple > 1)
{
string strOffset = args[1].Substring(0, args[1].IndexOf("("));
uint offset = Encoder.ValueHelper.GetAnyUnsignedValue(strOffset);
if ((offset % alignmentMultiple) != 0)
{
_errorTextBuilder.AppendLine("WARNING: Unaligned offset at address " + strPC);
}
}
}
if (conditions.Contains(ASMCheckCondition.MultCountdown))
{
bool isMultiplication = ((commandLower == "mult") || (commandLower == "multu"));
bool isDivision = ((commandLower == "div") || (commandLower == "divu"));
if ((hiLoCountdown > 0) && ((isMultiplication) || (isDivision)))
{
string operation = isMultiplication ? "Multiplication" : "Division";
_errorTextBuilder.AppendLine("WARNING: " + operation + " within 2 commands of " + hiLoCommand + " at address " + strPC);
}
}
if (isLoad)
{
gprLoad = args[0].Trim();
if (isLastCommandBranch)
{
if (conditions.Contains(ASMCheckCondition.LoadInBranchDelaySlot))
{
_errorTextBuilder.AppendLine("WARNING: Load command in branch delay slot at address " + strPC);
}
// If there is a load in the branch delay slot, check if the branch target address tries to use the loaded value
if (conditions.Contains(ASMCheckCondition.LoadDelay))
{
uint endPC = startPC + ((uint)(lines.Length - 1) * 4);
uint branchPC = lastBranchAddress;
string strBranchPC = "0x" + ASMValueHelper.UnsignedToHex_WithLength(branchPC, 8);
if ((startPC <= branchPC) && (branchPC <= endPC))
{
int index = (int)((branchPC - startPC) / 4);
string branchLine = lines[index];
string[] branchParts = ASMStringHelper.SplitLine(branchLine);
if (branchParts.Length > 1)
{
string strBranchArgs = branchParts[1];
if (!string.IsNullOrEmpty(strBranchArgs))
{
string[] branchArgs = strBranchArgs.Split(',');
CheckLoadDelay(branchParts[0], branchArgs, gprLoad, strBranchPC);
}
}
}
}
}
}
if (conditions.Contains(ASMCheckCondition.StackPointerOffset))
{
if (IsAddImmediateCommand(command))
{
string stackPointerRegName = Encoder.RegHelper.GetGPRegisterName(29, useRegAliases).ToLower().Trim();
if ((args[0].ToLower().Trim() == stackPointerRegName) && (args[1].ToLower().Trim() == stackPointerRegName))
{
uint immed = Encoder.ValueHelper.GetAnyUnsignedValue(args[2].ToLower().Trim());
if (immed % 8 != 0)
{
_errorTextBuilder.AppendLine("WARNING: Stack pointer offset not a multiple of 8 at address " + strPC);
}
}
}
}
if (isBranch)
{
lastBranchAddress = FindBranchTargetAddress(args);
}
}
// Check if we're jumping into a hazard
if (isLastCommandBranch)
{
uint endPC = startPC + ((uint)(lines.Length - 1) * 4);
uint branchPC = lastBranchAddress;
string strBranchPC = "0x" + ASMValueHelper.UnsignedToHex_WithLength(branchPC, 8);
if ((startPC <= branchPC) && (branchPC <= endPC))
{
int index = (int)((branchPC - startPC) / 4);
string branchLine = lines[index];
string[] branchParts = ASMStringHelper.SplitLine(branchLine);
if (branchParts.Length > 1)
{
string strCommand = branchParts[0];
string strBranchArgs = branchParts[1];
if (!string.IsNullOrEmpty(strBranchArgs))
{
string[] branchArgs = strBranchArgs.Split(',');
if (conditions.Contains(ASMCheckCondition.LoadDelay))
{
if ((IsLoadCommand(strCommand)) && ((branchPC + 4) <= endPC))
{
string secondBranchLine = lines[index + 1];
string[] secondBranchParts = ASMStringHelper.SplitLine(secondBranchLine);
if (secondBranchParts.Length > 1)
{
string strSecondBranchArgs = secondBranchParts[1];
if (!string.IsNullOrEmpty(strSecondBranchArgs))
{
string[] secondBranchArgs = strSecondBranchArgs.Split(',');
string strSecondBranchPC = "0x" + ASMValueHelper.UnsignedToHex_WithLength(branchPC + 4, 8);
string branchGprLoad = branchArgs[0].Trim();
CheckLoadDelay(secondBranchParts[0], secondBranchArgs, branchGprLoad, strSecondBranchPC);
}
}
}
}
if (conditions.Contains(ASMCheckCondition.MultCountdown))
{
string strCommandLower = strCommand.ToLower();
if ((strCommandLower == "mfhi") || (strCommandLower == "mflo"))
{
if (((branchPC + 4) <= endPC))
{
string nextBranchLine = lines[index + 1];
string[] nextBranchParts = ASMStringHelper.SplitLine(nextBranchLine);
if (nextBranchParts.Length > 0)
{
string nextBranchCommand = nextBranchParts[0].ToLower();
bool isMultiplication = ((nextBranchCommand == "mult") || (nextBranchCommand == "multu"));
bool isDivision = ((nextBranchCommand == "div") || (nextBranchCommand == "divu"));
if ((isMultiplication) || (isDivision))
{
string operation = isMultiplication ? "Multiplication" : "Division";
string strNextPC = "0x" + ASMValueHelper.UnsignedToHex_WithLength(branchPC + 4, 8);
_errorTextBuilder.AppendLine("WARNING: " + operation + " within 2 commands of " + strCommandLower + " at address " + strNextPC);
}
}
}
if (((branchPC + 8) <= endPC))
{
string nextBranchLine = lines[index + 2];
string[] nextBranchParts = ASMStringHelper.SplitLine(nextBranchLine);
if (nextBranchParts.Length > 0)
{
string nextBranchCommand = nextBranchParts[0].ToLower();
bool isMultiplication = ((nextBranchCommand == "mult") || (nextBranchCommand == "multu"));
bool isDivision = ((nextBranchCommand == "div") || (nextBranchCommand == "divu"));
if ((isMultiplication) || (isDivision))
{
string operation = isMultiplication ? "Multiplication" : "Division";
string strNextPC = "0x" + ASMValueHelper.UnsignedToHex_WithLength(branchPC + 8, 8);
_errorTextBuilder.AppendLine("WARNING: " + operation + " within 2 commands of " + strCommandLower + " at address " + strNextPC);
}
}
}
}
}
}
}
}
}
if (conditions.Contains(ASMCheckCondition.BranchInBranchDelaySlot))
{
if (isBranch && isLastCommandBranch)
{
_errorTextBuilder.AppendLine("WARNING: Branch command in branch delay slot at address " + strPC);
}
}
if (!isLoad)
{
gprLoad = "";
}
if (isLastCommandUnconditionalJump)
{
hiLoCountdown = 0;
}
else if ((commandLower == "mfhi") || (commandLower == "mflo"))
{
hiLoCountdown = 2;
hiLoCommand = commandLower;
}
else if (hiLoCountdown > 0)
{
hiLoCountdown--;
}
isLastCommandBranch = isBranch;
isLastCommandUnconditionalJumpDelaySlot = isLastCommandUnconditionalJump;
isLastCommandUnconditionalJump = isUnconditionalJump;
pc += 4;
}
return(new ASMCheckResult
{
ErrorText = _errorTextBuilder.ToString(),
IsASM = isASM
});
}
public ASMEncoderResult EncodeASM(string asm, uint pc, string spacePadding, bool includeAddress, bool littleEndian, bool clearErrorText)
{
if (clearErrorText)
{
ClearErrorText();
}
string[] lines = asm.Split('\n');
lines = ASMStringHelper.RemoveFromLines(lines, "\r");
string[] processLines = AddLabelLines(lines);
string oldErrorText = _errorTextBuilder.ToString();
EncodeLine[] encodeLines = PreprocessLines(processLines, pc);
int encodeLineIndex = 0;
int lineIndex = 0;
StringBuilder newTextASMBuilder = new StringBuilder();
StringBuilder newTextASMLineBuilder = new StringBuilder();
StringBuilder encodedASMBuilder = new StringBuilder();
List <byte> byteList = new List <byte>();
if (oldErrorText != _errorTextBuilder.ToString())
{
return(new ASMEncoderResult(encodedASMBuilder.ToString(), byteList.ToArray(), asm, _errorTextBuilder.ToString()));
}
foreach (string line in lines)
{
if (string.IsNullOrEmpty(line))
{
newTextASMBuilder.AppendLine();
continue;
}
newTextASMLineBuilder.Length = 0;
string modLine = ASMStringHelper.RemoveLeadingBracketBlock(line);
string processLine = ASMStringHelper.RemoveLeadingSpaces(modLine);
processLine = ASMStringHelper.RemoveComment(processLine).ToLower();
string[] parts = ASMStringHelper.SplitLine(processLine);
//pc = ASMPCHelper.ProcessOrg(pc, parts);
ASMProcessPCResult processPCResult = ASMPCHelper.ProcessOrg(pc, parts);
pc = processPCResult.PC;
_errorTextBuilder.Append(processPCResult.ErrorMessage);
parts = ASMStringHelper.RemoveLabel(parts);
// If this is an ASM command, pass off line to encoding routine
EncodingFormat encodingOrNull = FormatHelper.FindFormatByCommand(parts[0]);
if (encodingOrNull != null)
{
if (includeAddress)
{
newTextASMLineBuilder.Append("[0x");
newTextASMLineBuilder.Append(ASMValueHelper.UnsignedToHex_WithLength(pc, 8));
newTextASMLineBuilder.Append("] ");
}
newTextASMLineBuilder.AppendLine(modLine);
EncodeLine eLine = new EncodeLine();
if (encodeLines.Length > 0)
{
eLine = encodeLines[encodeLineIndex];
}
while ((eLine.LineIndex == lineIndex) && (encodeLineIndex < encodeLines.Length))
{
encodingOrNull = FormatHelper.FindFormatByCommand(eLine.LineParts[0]);
EncodingFormat encoding = encodingOrNull;
ASMSingleEncodeResult singleEncodeResult = TryEncodeSingle(eLine.LineParts, encoding, pc, modLine, littleEndian);
encodedASMBuilder.Append(spacePadding);
encodedASMBuilder.Append(singleEncodeResult.ASMText);
encodedASMBuilder.AppendLine();
//encodedASMBuilder.Append("\r\n");
byteList.AddRange(singleEncodeResult.Bytes);
encodeLineIndex++;
pc += 4;
if (encodeLineIndex < encodeLines.Length)
{
eLine = encodeLines[encodeLineIndex];
}
}
lineIndex++;
}
else
{
if (!string.IsNullOrEmpty(parts[0]))
{
if ((parts[0] != ".org") && (parts[0] != ".label") && (parts[0] != ".eqv") && (!parts[0].EndsWith(":")))
{
_errorTextBuilder.AppendLine("WARNING: Ignoring unknown command \"" + parts[0] + "\".");
}
}
}
if (string.IsNullOrEmpty(newTextASMLineBuilder.ToString()))
{
newTextASMLineBuilder.AppendLine(modLine);
}
newTextASMBuilder.Append(newTextASMLineBuilder.ToString());
}
string newTextASM = newTextASMBuilder.ToString();
if (newTextASM.EndsWith("\r\n"))
{
newTextASMBuilder.Length -= 2;
}
else if (newTextASM.EndsWith("\n"))
{
newTextASMBuilder.Length -= 1;
}
newTextASM = newTextASMBuilder.ToString();
return(new ASMEncoderResult(encodedASMBuilder.ToString(), byteList.ToArray(), newTextASM, _errorTextBuilder.ToString()));
}
private ASMSingleEncodeResult EncodeASMSingle(string[] parts, EncodingFormat encoding, uint pc, bool littleEndian)
{
// Initialize variables
//string binary = "";
//string hex = "";
string strArgs = "";
string[] args = null;
/*
* if (!string.IsNullOrEmpty(parts[1]))
* {
* strArgs = ASMStringHelper.RemoveSpaces(parts[1]).Replace('(',',').Replace(")","");
* args = strArgs.Split(',');
* }
*/
// Find encoding format and syntax
string command = parts[0].ToLower();
EncodingFormat encodingFormat = FormatHelper.FindFormatByCommand(command);
string formatBinary = encodingFormat.Binary;
string syntax = encodingFormat.Syntax;
string newFormat = formatBinary;
if (!string.IsNullOrEmpty(parts[1]))
{
List <string> argsList = new List <string>();
strArgs = ASMStringHelper.RemoveSpaces(parts[1]);
bool foundArg = false;
int strArgCharIndex = 0;
foreach (char currentChar in syntax)
{
if (Char.IsLetter(currentChar))
{
foundArg = true;
}
else if (foundArg)
{
foundArg = false;
bool isHiLo = ((strArgs.IndexOf("%hi(", strArgCharIndex) == strArgCharIndex) || (strArgs.IndexOf("%lo(", strArgCharIndex) == strArgCharIndex));
int separatorIndex = strArgs.IndexOf(currentChar, strArgCharIndex + (isHiLo ? 4 : 0));
argsList.Add(strArgs.Substring(strArgCharIndex, separatorIndex - strArgCharIndex));
strArgCharIndex = separatorIndex + 1;
}
}
if (foundArg)
{
argsList.Add(strArgs.Substring(strArgCharIndex, strArgs.Length - strArgCharIndex));
}
args = argsList.ToArray();
}
// Create array for registers and immediates
Nullable <uint>[] regValue = new Nullable <uint> [26];
Nullable <uint>[][] partialRegValue = new Nullable <uint> [26][];
uint[] immedValue = new uint[26];
int argsIndex = 0;
int regIndex = 0;
int immedIndex = 0;
// Fill arrays based on order of arguments (syntax)
foreach (char elementTypeChar in syntax)
{
bool incrementArgsIndex = true;
switch (elementTypeChar)
{
case ASMElementTypeCharacter.GPRegister:
regValue[regIndex++] = EncodeGPRegister(args[argsIndex]);
break;
case ASMElementTypeCharacter.GenericRegister:
regValue[regIndex++] = EncodeGenericRegister(args[argsIndex]);
break;
case ASMElementTypeCharacter.FloatRegister:
regValue[regIndex++] = EncodeFloatRegister(args[argsIndex]);
break;
case ASMElementTypeCharacter.VFPURegister:
regValue[regIndex] = EncodeVFPURegister(args[argsIndex], encodingFormat.VFPURegisterTypes[regIndex]);
regIndex++;
break;
case ASMElementTypeCharacter.PartialVFPURegister:
partialRegValue[regIndex] = EncodePartialVFPURegister(args[argsIndex], encodingFormat.VFPURegisterTypes[regIndex], encodingFormat.PartialRegisterSizes, encodingFormat.PartialRegisterIncludeMasks[regIndex]);
regIndex++;
break;
case ASMElementTypeCharacter.InvertedSingleBitVFPURegister:
regValue[regIndex] = EncodeInvertedSingleBitVFPURegister(args[argsIndex], encodingFormat.VFPURegisterTypes[regIndex]);
regIndex++;
break;
case ASMElementTypeCharacter.Cop0Register:
regValue[regIndex] = EncodeCop0Register(args[argsIndex]);
regIndex++;
break;
case ASMElementTypeCharacter.GTEControlRegister:
regValue[regIndex] = EncodeGTEControlRegister(args[argsIndex]);
regIndex++;
break;
case ASMElementTypeCharacter.GTEDataRegister:
regValue[regIndex] = EncodeGTEDataRegister(args[argsIndex]);
regIndex++;
break;
case ASMElementTypeCharacter.SignedImmediate:
case ASMElementTypeCharacter.UnsignedImmediate:
immedValue[immedIndex] = EncodeImmediate(args[argsIndex], encodingFormat.ImmediateLengths[immedIndex], (uint)encodingFormat.ImmediateIncludeMasks[immedIndex]);
immedIndex++;
break;
case ASMElementTypeCharacter.BranchImmediate:
immedValue[immedIndex] = EncodeBranchImmediate(args[argsIndex], pc, (uint)encodingFormat.ImmediateIncludeMasks[immedIndex]);
immedIndex++;
break;
case ASMElementTypeCharacter.JumpImmediate:
immedValue[immedIndex] = EncodeJumpImmediate(args[argsIndex], 26, pc);
immedIndex++;
break;
case ASMElementTypeCharacter.DecrementedImmediate:
immedValue[immedIndex] = EncodeDecrementedImmediate(args[argsIndex], encodingFormat.ImmediateLengths[immedIndex], (uint)encodingFormat.ImmediateIncludeMasks[immedIndex]);
immedIndex++;
break;
case ASMElementTypeCharacter.ModifiedImmediate:
immedValue[immedIndex] = EncodeModifiedImmediate(args[argsIndex], args[argsIndex - 1], encodingFormat.ImmediateLengths[immedIndex], (uint)encodingFormat.ImmediateIncludeMasks[immedIndex]);
immedIndex++;
break;
case ASMElementTypeCharacter.ShiftedImmediate:
immedValue[immedIndex] = EncodeShiftedImmediate(args[argsIndex], encodingFormat.ImmediateLengths[immedIndex], encodingFormat.ShiftedImmediateAmounts[immedIndex], (uint)encodingFormat.ImmediateIncludeMasks[immedIndex]);
immedIndex++;
break;
case ASMElementTypeCharacter.VFPUPrefixImmediate:
immedValue[immedIndex] = EncodeVFPUPrefixImmediate(args[argsIndex], encodingFormat.VFPUPrefixType, encodingFormat.ImmediateLengths[immedIndex]);
immedIndex++;
break;
default:
incrementArgsIndex = false;
break;
}
if (incrementArgsIndex)
{
argsIndex++;
}
}
/*
* // Replace bracket blocks in format with appropriate values
* for (int i = 0; i < regIndex; i++)
* {
* newFormat = newFormat.Replace("[" + encodingFormat.RegisterTypes[i] + (i + 1) + "]", regBinary[i]);
*
* if (partialRegBinary[i] != null)
* {
* newFormat = newFormat.Replace("[" + encodingFormat.RegisterTypes[i] + (i + 1) + "-1]", partialRegBinary[i][0]);
* newFormat = newFormat.Replace("[" + encodingFormat.RegisterTypes[i] + (i + 1) + "-2]", partialRegBinary[i][1]);
* }
* }
* for (int i = 0; i < immedIndex; i++)
* {
* newFormat = newFormat.Replace("[" + encodingFormat.ImmediateTypes[i] + (i + 1) + "]", immedBinary[i]);
* }
*
* binary = newFormat;
*/
uint uEncodingValue = encodingFormat.BaseEncoding;
for (int i = 0; i < regIndex; i++)
{
if (regValue[i] != null)
{
uEncodingValue |= (((uint)regValue[i]) << encodingFormat.RegisterPositions[i]);
}
else if (partialRegValue[i] != null)
{
uEncodingValue |= (((uint)partialRegValue[i][0]) << encodingFormat.PartialRegisterPositions[i][0]);
uEncodingValue |= (((uint)partialRegValue[i][1]) << encodingFormat.PartialRegisterPositions[i][1]);
}
}
for (int i = 0; i < immedIndex; i++)
{
uEncodingValue |= (immedValue[i] << encodingFormat.ImmediatePositions[i]);
}
//byte[] bytes = BitConverter.GetBytes(uEncodingValue);
byte[] bytes = ASMValueHelper.ConvertUIntToBytes(uEncodingValue, littleEndian);
if (littleEndian)
{
uEncodingValue = ASMValueHelper.ReverseBytes(uEncodingValue);
}
//else
//{
// Array.Reverse(bytes);
//}
string hex = ASMValueHelper.UnsignedToHex_WithLength(uEncodingValue, 8).ToUpper();
return(new ASMSingleEncodeResult(hex, bytes));
}
private string DecodeUnsignedImmediate(int immedValue, int length)
{
uint uValue = (uint)immedValue;
return("0x" + ASMValueHelper.UnsignedToHex_WithLength(uValue, length).ToLower());
}
private string DecodeASMSingle(uint line, uint pc, bool useRegAliases)
{
_illegalFlag = false;
// Find the binary line and format
//string binaryLine = ASMValueHelper.HexToBinary_WithLength(line, 32);
//uint uBinaryLine = ASMValueHelper.BinaryToUnsigned(binaryLine);
EncodingFormat encFormat = FormatHelper.FindFormatByBinary(line);
// If we couldn't find the command, it's some kind of mystery! Either not included in
// the encoding file, or an illegal instruction.
if (encFormat == null)
{
_errorTextBuilder.AppendLine("WARNING: Unknown command: " + ASMValueHelper.UnsignedToHex_WithLength(line, 8).ToUpper());
return("unknown");
}
string newFormat = encFormat.ExpandedFormat;
string syntax = encFormat.Syntax;
string formatBinary = encFormat.Binary;
string newSyntax = syntax;
// Loop through syntax field and replace appropriate values
int regIndex = 0;
int immedIndex = 0;
string argValue = "";
//string binaryValue = "";
//string prevBinaryValue = "";
int numericValue = 0;
int prevNumericValue = 0;
int syntaxLength = syntax.Length;
int newIndex = 0;
for (int i = 0; i < syntaxLength; i++)
{
char c = syntax[i];
// If this is a register or immediate, find value to replace in the syntax for the decoding
if (char.IsLetter(c))
{
int metaType = ASMFormatHelper.FindElementMetaType(c);
if (metaType == ASMElementMetaType.Register)
{
char lookupChar = ASMStringHelper.CreateRegisterChar(regIndex);
//int vfpuRegMode = (c == ASMElementTypeCharacter.VFPURegister ? encFormat.VFPURegisterTypes[regIndex] : 0);
switch (c)
{
case ASMElementTypeCharacter.PartialVFPURegister:
argValue = DecodePartialVFPURegister(encFormat, line, regIndex, lookupChar);
break;
case ASMElementTypeCharacter.InvertedSingleBitVFPURegister:
numericValue = FindNumericArgValue(line, encFormat.RegisterPositions[regIndex], encFormat.RegisterIncludeMasks[regIndex]);
argValue = DecodeInvertedSingleBitVFPURegister(numericValue, encFormat.VFPURegisterTypes[regIndex]);
break;
case ASMElementTypeCharacter.VFPURegister:
numericValue = FindNumericArgValue(line, encFormat.RegisterPositions[regIndex], encFormat.RegisterIncludeMasks[regIndex]);
argValue = DecodeRegister(numericValue, c, useRegAliases, encFormat.VFPURegisterTypes[regIndex]);
break;
default:
//int binaryIndex = newFormat.IndexOf(lookupChar);
//binaryValue = binaryLine.Substring(binaryIndex, ASMRegisterHelper.GetEncodingBitLength(c));
numericValue = FindNumericArgValue(line, encFormat.RegisterPositions[regIndex], encFormat.RegisterIncludeMasks[regIndex]);
argValue = DecodeRegister(numericValue, c, useRegAliases, 0);
break;
}
regIndex++;
}
else if (metaType == ASMElementMetaType.Immediate)
{
char lookupChar = ASMStringHelper.CreateImmediateChar(immedIndex);
int binaryIndex = newFormat.IndexOf(lookupChar);
//prevBinaryValue = binaryValue;
prevNumericValue = numericValue;
int immedLength = encFormat.ImmediateLengths[immedIndex];
int hexLength = (immedLength + 3) / 4;
//binaryValue = binaryLine.Substring(binaryIndex, immedLength);
//numericValue = FindNumericArgValue(line, encFormat.ImmediatePositions[immedIndex], ASMValueHelper.GetIncludeMask(encFormat.ImmediateLengths[immedIndex]));
numericValue = FindNumericArgValue(line, encFormat.ImmediatePositions[immedIndex], encFormat.ImmediateIncludeMasks[immedIndex]);
switch (c)
{
case ASMElementTypeCharacter.SignedImmediate:
argValue = DecodeSignedImmediate(numericValue, hexLength);
break;
case ASMElementTypeCharacter.UnsignedImmediate:
argValue = DecodeUnsignedImmediate(numericValue, hexLength);
break;
case ASMElementTypeCharacter.BranchImmediate:
argValue = DecodeBranchImmediate(numericValue, pc);
break;
case ASMElementTypeCharacter.JumpImmediate:
argValue = DecodeJumpImmediate(numericValue, pc);
break;
case ASMElementTypeCharacter.DecrementedImmediate:
argValue = DecodeDecrementedImmediate(numericValue, hexLength);
break;
case ASMElementTypeCharacter.ModifiedImmediate:
argValue = DecodeModifiedImmediate(numericValue, prevNumericValue, hexLength);
break;
case ASMElementTypeCharacter.ShiftedImmediate:
argValue = DecodeShiftedImmediate(numericValue, encFormat.ShiftedImmediateAmounts[immedIndex], hexLength);
break;
case ASMElementTypeCharacter.VFPUPrefixImmediate:
argValue = DecodeVFPUPrefixImmediate(numericValue, encFormat.VFPUPrefixType);
break;
default: break;
}
immedIndex++;
}
// Replace character in syntax with correct value
newSyntax = ASMStringHelper.ReplaceCharAtIndex(newSyntax, newIndex, argValue);
newIndex += argValue.Length - 1;
}
newIndex++;
}
string spacing = string.IsNullOrEmpty(newSyntax) ? "" : " ";
string decoding = encFormat.Command + spacing + newSyntax;
if (_illegalFlag)
{
decoding = "illegal";
_errorTextBuilder.AppendLine(ASMStringHelper.Concat("Illegal instruction: ", line.ToString("x"), ": ", encFormat.Command.ToUpper(), " (", _illegalMessage, ")"));
}
return(decoding);
}
// Translates pseudoinstructions
public ASMTranslatePseudoResult TranslatePseudo(string[] lines, uint startPC, bool skipLabelAssertion = false)
{
_errorTextBuilder.Length = 0;
bool reportErrors = !skipLabelAssertion;
ASMTranslatePseudoResult result = new ASMTranslatePseudoResult();
List <EncodeLine> resultLines = new List <EncodeLine>();
int index = 0;
uint pc = startPC;
List <bool> isSkippingLine = new List <bool>()
{
false
};
int ifNestLevel = 0;
foreach (string line in lines)
{
if (string.IsNullOrEmpty(line))
{
continue;
}
string processLine = ASMStringHelper.RemoveLeadingBracketBlock(line);
processLine = ASMStringHelper.RemoveLeadingSpaces(processLine);
processLine = ASMStringHelper.RemoveComment(processLine).ToLower();
processLine = ASMStringHelper.ConvertBracketBlocks(processLine);
string[] parts = ASMStringHelper.SplitLine(processLine);
parts = ASMStringHelper.RemoveLabel(parts);
//pc = ASMPCHelper.ProcessOrg(pc, parts);
ASMProcessPCResult processPCResult = ASMPCHelper.ProcessOrg(pc, parts, false);
pc = processPCResult.PC;
_errorTextBuilder.Append(processPCResult.ErrorMessage);
string firstPart = parts[0].ToLower().Trim();
if (firstPart == ".endif")
{
if (ifNestLevel == 0)
{
if (reportErrors)
{
_errorTextBuilder.AppendLine("WARNING: No matching .if statement for .endif statement at address 0x" + ASMValueHelper.UnsignedToHex_WithLength(pc, 8));
}
}
else
{
isSkippingLine.RemoveAt(isSkippingLine.Count - 1);
ifNestLevel--;
}
}
else if (firstPart == ".else")
{
if (ifNestLevel == 0)
{
if (reportErrors)
{
_errorTextBuilder.AppendLine("WARNING: No matching .if statement for .else statement at address 0x" + ASMValueHelper.UnsignedToHex_WithLength(pc, 8));
}
}
else if (!isSkippingLine[ifNestLevel - 1])
{
isSkippingLine[ifNestLevel] = !isSkippingLine[ifNestLevel];
}
}
else if (firstPart == ".if")
{
try
{
string[] innerParts = parts[1].Split(',');
if (!parts[1].Contains(","))
{
if (reportErrors)
{
_errorTextBuilder.AppendLine("WARNING: Unreachable code at address 0x" + ASMValueHelper.UnsignedToHex_WithLength(pc, 8)
+ " inside .if statement with bad argument list (no commas): \"" + parts[1] + "\"");
}
isSkippingLine.Add(true);
ifNestLevel++;
}
else if (innerParts.Length < 2)
{
if (reportErrors)
{
_errorTextBuilder.AppendLine("WARNING: Unreachable code at address 0x" + ASMValueHelper.UnsignedToHex_WithLength(pc, 8) +
" inside .if statement with bad argument list (less than 2 arguments): \"" + parts[1] + "\"");
}
isSkippingLine.Add(true);
ifNestLevel++;
}
else if (isSkippingLine[ifNestLevel])
{
isSkippingLine.Add(true);
ifNestLevel++;
}
else
{
string operation = string.Empty;
string eqvKey, eqvValue;
if (innerParts.Length >= 3)
{
operation = ASMStringHelper.RemoveSpaces(innerParts[0]);
eqvKey = ASMStringHelper.RemoveSpaces(innerParts[1]);
eqvValue = ASMStringHelper.RemoveSpaces(innerParts[2]);
}
else
{
operation = "=";
eqvKey = ASMStringHelper.RemoveSpaces(innerParts[0]);
eqvValue = ASMStringHelper.RemoveSpaces(innerParts[1]);
}
int intKey = 0;
int intValue = 0;
bool isKeyInt = int.TryParse(eqvKey, out intKey);
bool isValueInt = int.TryParse(eqvValue, out intValue);
bool isIntCompare = isKeyInt && isValueInt;
bool isPass = false;
switch (operation)
{
case "=":
case "==":
isPass = eqvKey.Equals(eqvValue);
break;
case "!=":
case "<>":
isPass = !eqvKey.Equals(eqvValue);
break;
case "<":
isPass = isIntCompare && (intKey < intValue);
break;
case ">":
isPass = isIntCompare && (intKey > intValue);
break;
case "<=":
isPass = isIntCompare && (intKey <= intValue);
break;
case ">=":
isPass = isIntCompare && (intKey >= intValue);
break;
default:
break;
}
isSkippingLine.Add(!isPass);
ifNestLevel++;
}
}
catch (Exception ex)
{
if (reportErrors)
{
_errorTextBuilder.AppendLine("Error on .if statement: " + ex.Message + "\r\n");
}
}
}
else
{
// If this is an ASM command, pass off line to translating routine
EncodingFormat encodingOrNull = FormatHelper.FindFormatByCommand(parts[0]);
if (encodingOrNull != null)
{
try
{
if (!isSkippingLine[ifNestLevel])
{
EncodingFormat encoding = encodingOrNull;
EncodeLine[] encodeLines = TranslatePseudoSingle(encoding, parts, index, pc, skipLabelAssertion);
foreach (EncodeLine encodeLine in encodeLines)
{
resultLines.Add(encodeLine);
pc += 4;
}
//index++;
}
}
catch (Exception ex)
{
if (reportErrors)
{
//result.errorMessage = "Error translating pseudoinstruction: " + line;
_errorTextBuilder.Append("Error translating pseudoinstruction: " + line + " (" + ex.Message + ")\r\n");
}
//result.lines = null;
//return result;
//index++;
}
index++;
}
}
}
result.lines = resultLines.ToArray();
result.errorMessage = _errorTextBuilder.ToString();
return(result);
}