/// <summary>
/// Exit a parse tree produced by the <c>InstruccionIndexada</c>
/// labeled alternative in <see cref="SicAsmParser.inst"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitInstruccionIndexada([NotNull] SicAsmParser.InstruccionIndexadaContext context)
{
}
public override string VisitInstruccionIndexada([NotNull] SicAsmParser.InstruccionIndexadaContext context)
{
string addr_mode = "I";
string label = "----";
string inst = "";
string id = "";
int addr_value = 0;
int cp = _program_counter;
string opcode;
inst = context.opcode.Text;
opcode = (string)_opcodes[inst];
if (_first_inst_addr == -1)
{
_first_inst_addr = cp;
}
switch (context.num_type.Type)
{
case SicAsmParser.LABEL:
id = context.LABEL().GetText();
/*Si es segunda pasada...*/
if (!_is_first_pass)
{
if (_symtab.ContainsKey(id))
{
addr_value = (int)_symtab[id];
}
else
{
addr_value = MAX_ADDR;
_lines_opcode.Add(_line_count + 1, opcode + addr_value.ToString("X4"));
return("Error: símbolo \"" + id + "\" No definido");
}
}
break;
case SicAsmParser.HEX:
string hex_str = context.HEX().GetText().Remove(context.HEX().GetText().Length - 1);
id = "" + int.Parse(hex_str, System.Globalization.NumberStyles.HexNumber);
addr_value = int.Parse(hex_str, System.Globalization.NumberStyles.HexNumber);
break;
case SicAsmParser.INT:
id = context.INT().GetText();
addr_value = int.Parse(id);
break;
}
/* Si es la primera pasada */
if (_is_first_pass)
{
_lines_pc.Add(_line_count + 1, _program_counter);
_program_counter += 3;
}
else /* Si es la segunda pasada */
{
if (addr_value > MAX_ADDR)
{
addr_value = 0xFFFF;
_lines_opcode.Add(_line_count + 1, opcode + addr_value.ToString("X4"));
return("Error, dirección fuera de rango, debe ser menor o igual a 0x7FFF");
}
addr_value |= 0x8000;
_lines_opcode.Add(_line_count + 1, opcode + addr_value.ToString("X4"));
}
return("PC= " + cp + " LABEL=" + label + " OPCODE=" + inst + " ID=" + id + " M:" + addr_mode);
}
/// <summary>
/// Visit a parse tree produced by the <c>InstruccionIndexada</c>
/// labeled alternative in <see cref="SicAsmParser.inst"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitInstruccionIndexada([NotNull] SicAsmParser.InstruccionIndexadaContext context)
{
return(VisitChildren(context));
}