public static Instruction FromDefinition(InstructionDefinition def, Register rs, params int[] args)
{
if (args.Length != def.Arguments.Length)
{
throw new ArgumentException("Wrong number of arguments.");
}
Instruction ins = new Instruction
{
OpCode = def.OpCode
};
if (def.OpCode == OpCode.Register)
{
ins.FunctionCode = def.FunctionCode;
}
if (def.OpCode == OpCode.Branch)
{
ins.BranchCode = def.BranchCode;
}
for (int i = 0; i < def.Arguments.Length; i++)
{
switch (def.Arguments[i])
{
case InstructionArgumentType.Rd:
ins.Rd = args[i];
break;
case InstructionArgumentType.Rs:
ins.Rs = args[i];
break;
case InstructionArgumentType.Rt:
ins.Rt = args[i];
break;
case InstructionArgumentType.Sa:
ins.sa = (byte)args[i];
break;
case InstructionArgumentType.Label:
case InstructionArgumentType.Immediate:
ins.Target = args[i];
ins.Immediate = (ushort)args[i];
break;
case InstructionArgumentType.ImmediateRs:
ins.Immediate = (ushort)args[i];
ins.Rs = (int)rs;
break;
}
}
return(ins);
}
/// <summary>
/// Gets the string representation of an instruction.
/// </summary>
public static string GetString(Instruction ins)
{
if (ins.OriginalInstruction.HasValue && ins.OriginalInstruction.Value == 0)
{
return("null");
}
// Get the instruction definition for this instruction
var def = InstructionDefinition.ForInstruction(ins);
// Join all the arguments together, calling GetArg on each argument.
var args = string.Join(", ", def.Arguments.Select(arg => GetArg(arg, ins)));
// Format the instruction.
return(string.Format("{0} {1}", def.Name, args).Trim());
}
public override string ToString()
{
return(InstructionDefinition.GetString(this));
}
public static Instruction FromDefinition(InstructionDefinition def, params int[] args)
{
return(FromDefinition(def, Register.zero, args));
}