internal static List <Statement> ParseConditionStatements(List <Statement> condStatements, Label TargetLabel)
{
var newStatements = new List <Statement>();
GotoCondition cond = GotoCondition.None;
Declaration lastMoveDecl = null;
foreach (var statement in condStatements)
{
if (statement is Goto)
{
var gotoStatement = statement as Goto;
}
else if (statement is Move)
{
var move = statement as Move;
lastMoveDecl = move.LValue;
}
else if (statement is Math.Not)
{
switch (cond)
{
case GotoCondition.NZ:
cond = GotoCondition.Z;
break;
case GotoCondition.Z:
cond = GotoCondition.NZ;
break;
case GotoCondition.C:
cond = GotoCondition.NC;
break;
case GotoCondition.NC:
cond = GotoCondition.C;
break;
}
}
else if (statement is Equals)
{
cond = GotoCondition.Z;
}
else if (statement is NotEquals)
{
cond = GotoCondition.NZ;
}
newStatements.Add(statement);
}
newStatements.Add(new Goto(TargetLabel, lastMoveDecl, cond));
return(newStatements);
}
public Goto(Label lbl, Declaration condDecl, GotoCondition cond)
{
TargetLabel = lbl;
CondDecl = condDecl;
GotoCond = cond;
}
public Goto(Label lbl)
{
TargetLabel = lbl;
GotoCond = Goto.GotoCondition.None;
}
