public static IEnumerable <IInstruction> BuildLogicalNot(IEnumerable <IInstruction> operandInstructions)
{
int currentCount = _count++;
List <IInstruction> instructions = new List <IInstruction>();
string labelEnd = $"NotCodeGeneration_{currentCount}_end";
string labelFalse = $"NotCodeGeneration_{currentCount}_false";
instructions.AddRange(operandInstructions);
instructions.Add(IfneInstruction.WithLabel(labelFalse));
instructions.Add(Iconst_1Instruction);
instructions.Add(GotoInstruction.WithLabel(labelEnd));
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelFalse));
instructions.Add(Iconst_0Instruction);
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelEnd));
return(instructions);
}
public static IEnumerable <IInstruction> BuildWhile(IEnumerable <IInstruction> conditionInstructions,
IEnumerable <IInstruction> bodyInstructions)
{
int currentCount = _count++;
string labelEnd = $"WhileCodeGeneration_{currentCount}_end";
string labelStart = $"WhileCodeGeneration_{currentCount}_start";
List <IInstruction> instructions = new List <IInstruction>();
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelStart));
instructions.AddRange(conditionInstructions);
instructions.Add(IfeqInstruction.WithLabel(labelEnd));
instructions.AddRange(bodyInstructions);
instructions.Add(GotoInstruction.WithLabel(labelStart));
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelEnd));
return(instructions);
}
public static IEnumerable <IInstruction> BuildIf(IEnumerable <IInstruction> conditionInstructions,
IEnumerable <IInstruction> trueCondtionInstructions, IEnumerable <IInstruction> falseConditionInstructions)
{
int currentCount = _count++;
List <IInstruction> instructions = new List <IInstruction>();
string labelEnd = $"IfCodeGeneration_{currentCount}_end";
string labelFalse = $"IfCodeGeneration_{currentCount}_false";
string labelTrue = $"IfCodeGeneration_{currentCount}_true";
instructions.AddRange(conditionInstructions);
instructions.Add(IfeqInstruction.WithLabel(labelFalse));
instructions.AddRange(trueCondtionInstructions);
instructions.Add(GotoInstruction.WithLabel(labelEnd));
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelFalse));
instructions.AddRange(falseConditionInstructions);
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelEnd));
return(instructions);
}
public static IEnumerable <IInstruction> BuildCompareInstrution(
IEnumerable <IInstruction> leftOperandInstructions,
IEnumerable <IInstruction> rightOperandInstructions, LabelInstruction compareInstruction)
{
string labelEnd = $"{compareInstruction.Name}_{_count}_end";
string labelTrue = $"{compareInstruction.Name}_{_count}_true";
_count++;
List <IInstruction> instructions = new List <IInstruction>();
instructions.AddRange(leftOperandInstructions);
instructions.AddRange(rightOperandInstructions);
instructions.Add(compareInstruction.WithLabel(labelTrue));
instructions.Add(Iconst_0Instruction);
instructions.Add(GotoInstruction.WithLabel(labelEnd));
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelTrue));
instructions.Add(Iconst_1Instruction);
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelEnd));
return(instructions);
}
public static IEnumerable <IInstruction> BuildLogicalAnd(IEnumerable <IInstruction> leftOperandInstructions,
IEnumerable <IInstruction> rightOperandInstructions)
{
int currentCount = _count++;
List <IInstruction> instructions = new List <IInstruction>();
var ifeqInstruction = IfeqInstruction;
string labelEnd = $"AndCodeGeneration_{currentCount}_end";
string labelFalse = $"AndCodeGeneration_{currentCount}_false";
instructions.AddRange(leftOperandInstructions);
instructions.Add(ifeqInstruction.WithLabel(labelFalse));
instructions.AddRange(rightOperandInstructions);
instructions.Add(ifeqInstruction.WithLabel(labelFalse));
instructions.Add(Iconst_1Instruction);
instructions.Add(GotoInstruction.WithLabel(labelEnd));
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelFalse));
instructions.Add(Iconst_0Instruction);
instructions.Add(Instructions.InsertLabelInstruction.WithLabel(labelEnd));
return(instructions);
}