public static X86Instruction ReadInstruction(AsmToken[] tokenLine)
{
int tokenCount = tokenLine.Length;
if (tokenLine[0].Token != AsmTokens.Name)
{
throw new UnexpectedTokenException(tokenLine[0], AsmTokens.Name);
}
string instructionName = tokenLine[0].Value;
int line = tokenLine[0].AsmLine;
if (tokenCount == 1)
{
return(new X86Instruction(line, instructionName));
}
X86Operand dst;
X86Operand src = null;
switch (tokenLine[1].Token)
{
case AsmTokens.Name:
if (X86Assembler.IsRegister(tokenLine[1].Value))
{
dst = new RegisterArgument(tokenLine[1].Value);
}
else
{
dst = new LabelArgument(tokenLine[1].Value);
}
break;
case AsmTokens.Number:
dst = new ImmediateArgument(tokenLine[1].IntValue);
break;
case AsmTokens.LeftBracket:
IntegerArithmeticExpression expr = IntegerArithmeticProcessor.Process(tokenLine, 1);
dst = new MemoryArgument(expr);
break;
default:
throw new UnexpectedTokenException(tokenLine[1]);
}
bool foundSrc = false;
for (int i = 2; i < tokenCount; i++)
{
if (tokenLine[i].Token == AsmTokens.Comma && i < tokenCount - 1)
{
foundSrc = true;
continue;
}
switch (tokenLine[i].Token)
{
case AsmTokens.Name:
if (X86Assembler.IsRegister(tokenLine[i].Value))
{
src = new RegisterArgument(tokenLine[i].Value);
}
else
{
src = new LabelArgument(tokenLine[i].Value);
}
goto Finish;
case AsmTokens.Number:
src = new ImmediateArgument(tokenLine[i].IntValue);
goto Finish;
case AsmTokens.LeftBracket:
IntegerArithmeticExpression expr = IntegerArithmeticProcessor.Process(tokenLine, i);
src = new MemoryArgument(expr);
goto Finish;
default:
throw new UnexpectedTokenException(tokenLine[i]);
}
}
Finish:
if (!foundSrc)
{
return(new X86Instruction(line, instructionName, dst));
}
return(new X86Instruction(line, instructionName, dst, src));
}
private string TranslateMemory(MemoryArgument arg)
{
var sb = new StringBuilder();
foreach (IntegerArithmeticExpressionMember member in arg.Expression.Members)
{
if (member is IntegerArithmeticOperator)
{
sb.Append((member as IntegerArithmeticOperator));
}
if (member is IntegerArithmeticExpressionTerm)
{
var term = member as IntegerArithmeticExpressionTerm;
if (term.Type == IntegerArithmeticExpressionTermType.Register)
sb.Append(GetRegister(term.Value));
if (term.Type == IntegerArithmeticExpressionTermType.Constant)
sb.Append(term.Value);
}
}
if (_yieldAddress)
return sb.ToString();
return "vm[" + sb + "]";
}
public static X86Instruction ReadInstruction(AsmToken[] tokenLine)
{
int tokenCount = tokenLine.Length;
if (tokenLine[0].Token != AsmTokens.Name)
{
throw new UnexpectedTokenException(tokenLine[0], AsmTokens.Name);
}
string instructionName = tokenLine[0].Value;
int line = tokenLine[0].AsmLine;
if (tokenCount == 1)
{
return new X86Instruction(line, instructionName);
}
X86Operand dst;
X86Operand src = null;
switch (tokenLine[1].Token)
{
case AsmTokens.Name:
if (X86Assembler.IsRegister(tokenLine[1].Value))
{
dst = new RegisterArgument(tokenLine[1].Value);
}
else
{
dst = new LabelArgument(tokenLine[1].Value);
}
break;
case AsmTokens.Number:
dst = new ImmediateArgument(tokenLine[1].IntValue);
break;
case AsmTokens.LeftBracket:
IntegerArithmeticExpression expr = IntegerArithmeticProcessor.Process(tokenLine, 1);
dst = new MemoryArgument(expr);
break;
default:
throw new UnexpectedTokenException(tokenLine[1]);
}
bool foundSrc = false;
for (int i = 2; i < tokenCount; i++)
{
if (tokenLine[i].Token == AsmTokens.Comma && i < tokenCount - 1)
{
foundSrc = true;
continue;
}
switch (tokenLine[i].Token)
{
case AsmTokens.Name:
if (X86Assembler.IsRegister(tokenLine[i].Value))
{
src = new RegisterArgument(tokenLine[i].Value);
}
else
{
src = new LabelArgument(tokenLine[i].Value);
}
goto Finish;
case AsmTokens.Number:
src = new ImmediateArgument(tokenLine[i].IntValue);
goto Finish;
case AsmTokens.LeftBracket:
IntegerArithmeticExpression expr = IntegerArithmeticProcessor.Process(tokenLine, i);
src = new MemoryArgument(expr);
goto Finish;
default:
throw new UnexpectedTokenException(tokenLine[i]);
}
}
Finish:
if (!foundSrc)
{
return new X86Instruction(line, instructionName, dst);
}
return new X86Instruction(line, instructionName, dst, src);
}