public bool Initialize()
{
Pointer = 0;
OpCode.Clear();
OpCode.AddRange(Code.Split(',').Select(x => int.Parse(x)));
return(true);
}
public bool RestoreMemory()
{
OpCode.Clear();
OpCode.AddRange(Code.Split(',').Select(x => int.Parse(x)).ToList());
Pointer = 0;
Noun = 0;
Verb = 0;
return(true);
}
public void ParsingText(string s)
{
Token tk;
int instwidth = 0;
if (s != null)
{
//is pre inst?
opcode.Clear();
Inst inst = OpCode.IsPreOpCode(s);
if (inst != Inst.none)
{
opcode.preinst = inst;
tk = lex.NextToken();
if (tk != Token.Ident)
{
Error("inst expect but " + s + " found");
lex.SkipLine();
return;
}
s = lex.GetTokenString();
lex.Match(Token.Ident);
}
;
// is inst?
inst = opcode.IsOpCode(s);
if (inst == Inst.none)
{
Error("unknow inst: " + s);
lex.SkipLine();
return;
}
else
{
opcode.inst = inst;
instwidth = opcode.GetInstWidth(opcode.inst);
}
}
int count = opcode.ParamCount;
int index = 0;
while (count > 0)
{
tk = lex.NextToken();
// a indexed addressing mode like -1(,,)
if (tk == Token.plus || tk == Token.minus || tk == Token.Number)
{
if (!ParsingImmValue(tk))
{
return;
}
tk = lex.NextToken();
if (tk == Token.leftbracket)
{
ParsingIndexedAddressingMode(index);
}
else
{
Error("'(' expect but" + lex.GetTokenString() + " found");
lex.SkipLine();
return;
}
}
// (,,)
else if (tk == Token.leftbracket)
{
ParsingIndexedAddressingMode(index);
}
//immVariable or indexed addressing value(,,)
else if (tk == Token.Ident)
{
if (!ParsingImmVariable(tk, index))
{
return;
}
tk = lex.NextToken();
if (tk == Token.leftbracket)
{
ParsingIndexedAddressingMode(index);
}
}
//register addressing like %eax , %cs or indexed addressing %cs(,,) %cs:-10(,,) %cs:value(,,)
else if (tk == Token.percent)
{
Addressing addressing = ParsingRegister();
if (addressing == Addressing.none)
{
return;
}
if (opcode.IsSegRegister(addressing))
{
opcode.SegReg = addressing;
tk = lex.NextToken();
if (tk == Token.leftbracket)
{
ParsingIndexedAddressingMode(index);
}
else if (tk == Token.Ident)
{
if (!ParsingImmVariable(tk, index))
{
return;
}
tk = lex.NextToken();
if (tk == Token.leftbracket)
{
ParsingIndexedAddressingMode(index);
}
}
else if (tk == Token.plus || tk == Token.minus || tk == Token.Number)
{
if (!ParsingImmValue(tk))
{
return;
}
tk = lex.NextToken();
opcode.Imm = opcode.TempImm;
if (tk == Token.leftbracket)
{
ParsingIndexedAddressingMode(index);
}
}
else
{
opcode.Register[index] = addressing;
}
}
else
{
if (CheckRegisterWidth(addressing, instwidth))
{
opcode.Register[index] = addressing;
}
else
{
return;
}
}
}
//imm addr $10 or $addr
else if (tk == Token.dollar)
{
lex.Match(Token.dollar);
tk = lex.NextToken();
if (tk == Token.Ident)
{
s = lex.GetTokenString();
int addr = GetLabelAddr(s);
if (addr == -1)
{
Error("unknown identifier: " + s);
lex.SkipLine();
return;
}
lex.Match(Token.Ident);
opcode.Imm = addr;
opcode.Register[index] = Addressing.imm;
}
else if (tk == Token.plus || tk == Token.minus || tk == Token.Number)
{
if (!ParsingImmValue(tk))
{
return;
}
opcode.Imm = opcode.TempImm;
opcode.Register[index] = Addressing.imm;
}
}
count--;
if (count > 0)
{
if (!lex.Match(Token.comma))
{
Error("',' expect but " + lex.GetTokenString() + " found");
lex.SkipLine();
}
}
index++;
}
EmitCode();
}
