public override void execute(StackFrame frame)
{
Object returnVal = frame.popOperand();
if (returnVal is NullValue || returnVal is Heap.HeapReference || returnVal is ClassFile || returnVal is Thread){
frame.getPrev().pushOperand(returnVal);
}
else throw new ToyVMException("areturn inconsistent " + returnVal,frame);
}
public override void execute(StackFrame frame)
{
frame.getPrev().pushOperand((double) frame.popOperand());
}