How to building a op-amp using test curve

There is an amplifier whose supplier cannot provide spice model. I hope to model it for functional simulation.
Find related articles, Pspice provides Model Editor tool, need to provide “large signal swing data”, “input open loop gain data”, “open loop gain phase data”, “maximum output swing data”, and then you can model the amplifier.
Resources for “http://www.lensonchain.com/article.php?id=56”;
Would you like to know how Qspice creates a model?
So, thank you very much.