I don't think this is a standalone IC... No clock input (maybe internal?), no marked the power pins and also no numbered the other pins...
Are You sure, this is one chip?
Yes it is a MACRO model, witch contain a number of logic.
Here is the macro expanded.
If you build this subcircuit and wire it up as show in your circuit, then is should be working.
not the clock also need to be created since the clock itself is a another macro/subcircuit.