public void Add(Assembler assembler)
{
assemblers.Add(assembler);
assembler.AssemblerGroup = this;
}
public void Remove(Assembler assembler)
{
assemblers.Remove(assembler);
assembler.AssemblerGroup = new AssemblerGroup();
}
/// <summary>
/// called on second pass once labels have already been initialized
/// addressing method has already been assigned to
/// </summary>
/// <param name="assembler"></param>
public void ResolveLabelsAndAssembleSecondPass(Assembler assembler, int lineno)
{
if (this.VariableAssignment != null)
{
return;
}
if (this.AddressingMethod != null && this.AddressingMethod.Value == Assembly.AddressingMethod.implied)
{
//no work to do
finishResolveLabelsAndAssembleSecondPass();
return;
}
if (!resolveLabels(assembler.Labels) && assembler.AssemblerGroup != null)
{
resolveLabels(assembler.AssemblerGroup.Labels);
}
if (this.Directive != null)
{
this.ComputedBytes = new List <byte>();
this.Directive.ParseValue();
if (this.Directive.Bytes != null)
{
this.ComputedBytes = this.Directive.Bytes.ToList();
return;
}
int n = this.Directive.ComputedValue.GetNumeral();
switch (this.Directive.Type)
{
case DirectiveType.@byte:
if (n < 0)
{
n = Assembly.TwosComplement8bit(n);
}
if (n < byte.MinValue || n > byte.MaxValue)
{
throw new SyntaxErrorException("Value out of range for byte");
}
ComputedBytes.Add((byte)n);
return;
case DirectiveType.word:
if (n < 0 || n > ushort.MaxValue)
{
throw new SyntaxErrorException("Value out of range for word");
}
foreach (byte b in Assembly.UshortToLE((ushort)n))
{
ComputedBytes.Add(b);
}
return;
}
throw new SyntaxErrorException("Unspecified error with directive");
}
if (this.RValue != null)
{
this.RValue.ParseValue(this.OpCode.Value, this.AddressingMethod.Value, PC);
}
//Label searching and value setting done - now only concerned with determining the addressing method
if (this.AddressingMethod != null)
{
//The label replacement has been finished by now, and jmps and branches are finished
finishResolveLabelsAndAssembleSecondPass();
return;
}
//throw new SyntaxErrorException(lineno, "End of second pass reached without finding an addressing method");
}