private ParsedOperand ParsePtrOperand(PrimitiveType width)
{
Expect(Token.PTR);
ParsedOperand op = ParseOperand();
op.Operand.Width = width;
return(op);
}
public ParsedOperand [] ParseOperandList(int min, int max)
{
OperandParser opp = asm.CreateOperandParser(lexer);
List <ParsedOperand> ops = new List <ParsedOperand>();
asm.SegmentOverride = RegisterStorage.None;
asm.AddressWidth = asm.SegmentAddressWidth;
if (lexer.PeekToken() != Token.EOL)
{
ops.Add(opp.ParseOperand());
if (opp.SegmentOverride != RegisterStorage.None)
{
asm.SegmentOverride = opp.SegmentOverride;
}
if (opp.AddressWidth != null)
{
asm.AddressWidth = opp.AddressWidth;
}
while (lexer.PeekToken() == Token.COMMA)
{
lexer.DiscardToken();
opp.DataWidth = ops[0].Operand.Width;
ops.Add(opp.ParseOperand());
if (opp.SegmentOverride != RegisterStorage.None)
{
if (asm.SegmentOverride != RegisterStorage.None)
{
Error("Can't have two segment overrides in one instruction");
}
asm.SegmentOverride = opp.SegmentOverride;
}
if (opp.AddressWidth != null)
{
asm.AddressWidth = opp.AddressWidth;
}
}
}
if (min <= ops.Count && ops.Count <= max)
{
ParsedOperand [] o = new ParsedOperand[ops.Count];
ops.CopyTo(o);
return(o);
}
else
{
if (min == max)
{
Error(string.Format("Instruction expects {0} operand(s).", min));
}
else
{
Error(string.Format("Instruction expects between {0} and {1} operand(s).", min, max));
}
return(null);
}
}
