public void Visit(BoolExpressionNode n)
{
foreach (var node in n.GetChildren())
{
node.SymTable = n.SymTable;
node.Accept(this);
}
}
public void Visit(BoolExpressionNode n)
{
PrintDOTIDLabel(n);
PrintDOTParentChild(n);
foreach (var child in n.GetChildren())
{
child.Accept(this);
}
}
public void Visit(BoolExpressionNode n)
{
var children = n.GetChildren();
foreach (var child in children)
{
child.SymTable = n.SymTable;
child.Accept(this);
}
}
public void Visit(BoolExpressionNode n)
{
var table = (FunctionSymbolTableEntry)n.SymTable;
n.TemporaryVariableName = table.MemoryLayout.AddTemporaryVariable();
var children = n.GetChildren();
foreach (var child in children)
{
child.Accept(this);
}
}
public void Visit(BoolExpressionNode n)
{
var table = (FunctionSymbolTableEntry)n.SymTable;
var children = n.GetChildren();
foreach (var child in children)
{
child.Accept(this);
}
var compareOp = ((CompareOpNode)children[1]).CompareOpType;
Instructions instruction;
switch (compareOp)
{
case CompareOpType.Equals:
instruction = Instructions.Ceq;
break;
case CompareOpType.NotEquals:
instruction = Instructions.Cne;
break;
case CompareOpType.GreaterThan:
instruction = Instructions.Cgt;
break;
case CompareOpType.LessThan:
instruction = Instructions.Clt;
break;
case CompareOpType.GreaterThanEqual:
instruction = Instructions.Cge;
break;
case CompareOpType.LessThanEqual:
instruction = Instructions.Clt;
break;
default:
throw new InvalidOperationException("Unknown boolexpr op");
}
var lhsVar = children[0].TemporaryVariableName;
var rhsVar = children[2].TemporaryVariableName;
var resultVar = n.TemporaryVariableName;
var lhsOffset = table.MemoryLayout.GetOffset(lhsVar);
var rhsOffset = table.MemoryLayout.GetOffset(rhsVar);
var resultOffset = table.MemoryLayout.GetOffset(resultVar);
_writer.WriteComment($"CompareOp ({compareOp})");
var lhsReg = PopRegister();
var rhsReg = PopRegister();
var resultReg = PopRegister();
_writer.WriteInstruction(Instructions.Lw, lhsReg, $"{lhsOffset}({FSPReg})");
_writer.WriteInstruction(Instructions.Lw, rhsReg, $"{rhsOffset}({FSPReg})");
_writer.WriteInstruction(instruction, resultReg, lhsReg, rhsReg);
_writer.WriteInstruction(Instructions.Sw, $"{resultOffset}({FSPReg})", resultReg);
PushRegister(resultReg);
PushRegister(rhsReg);
PushRegister(lhsReg);
}