public string Disassemble(string operationString)
{
var operation = SplitOperationString(operationString);
var instruction = LanguageDefinition.Instructions.Find(i => {
return(i.TextDisplay.ToLower() == operation[0].ToLower());
});
if (instruction == null)
{
throw new Exception("The operation supplied does not match any known instruction definition.");
}
var binary = new BinaryString(instruction.Binary);
var syntaxDefinition = new string[0];
var isMatch = false;
foreach (var syntax in instruction.Syntax)
{
syntaxDefinition = SplitOperationString(syntax);
if (operation.Length == syntaxDefinition.Length)
{
isMatch = true;
break;
}
}
if (!isMatch)
{
throw new Exception($"The operation does not match any known syntax definition for instruction {instruction.TextDisplay}");
}
var bitIndex = 0;
foreach (var arg in instruction.Args)
{
var definitionIndex = Array.FindIndex(syntaxDefinition, def => def == arg.Value);
if (definitionIndex != -1)
{
var argBinary = GetArgByValue(arg.Value, operation[definitionIndex]);
if (argBinary != null)
{
binary.Insert(bitIndex, argBinary.Value);
}
}
bitIndex += arg.Size;
}
return(binary.ToHexString().Value);
}
public string GetSyntaxArgByBinary(string placeholder, BinaryString argBinary)
{
if (LanguageDefinition.PlaceHolders.EERegisters.Contains(placeholder))
{
return(LanguageDefinition.EERegisters
.Find(r => r.Binary == argBinary.Value)?.TextDisplay);
}
else if (LanguageDefinition.PlaceHolders.COP0Registers.Equals(placeholder))
{
return(LanguageDefinition.COP0Registers
.Find(r => r.Binary == argBinary.Value)?.TextDisplay);
}
else if (LanguageDefinition.PlaceHolders.COP1Registers.Contains(placeholder))
{
return(LanguageDefinition.COP1Registers
.Find(r => r.Binary == argBinary.Value)?.TextDisplay);
}
else if (LanguageDefinition.PlaceHolders.JType.Equals(placeholder))
{
return("$" + Convert.ToString(argBinary.ToInt() * 4, 16).PadLeft(8, '0'));
}
else if (LanguageDefinition.PlaceHolders.IType.Contains(placeholder))
{
return("$" + argBinary.ToHexString().Value);
}
else if (LanguageDefinition.PlaceHolders.SA.Equals(placeholder))
{
return(argBinary.ToInt().ToString());
}
else if (LanguageDefinition.PlaceHolders.Code.Equals(placeholder))
{
return(argBinary.ToHexString().Value.PadLeft(5, '0'));
}
else
{
return(null);
}
}