The layout of the 4 resistors is a continuous poly silicon strip, instead of 4 poly strips connected by metal path and contacts.

Ywguo,
it seems your PDK does not support this.

B O E

Ywguo,

It is not only a question of the pcell.

You should decide how to handle the following problems:
How do you want your non-rectangular resistor to be extracted? What is its value(s)?

With answers to that you can try to write rules for Assura or Calibre implementing that.

B O E

Multitap resistors is a typical examples where standard analog techniques and minimum designkits are conflicting. Typical designkits serve the bare minimum analog design. They exclude many good analog methods and there modelling hide often important technology effects worth knowing because of liability reasons.

The multitap poly resistor requires a complete separation of the pure poly resistor rectangle and a second poly resistor tap rectangle. The extracted net where the tap contact the poly bar must be created by separating the poly bar into multiple resistor recognition rectangles touching each other. The touching line with the poly tap rectangle produce a T-form. For precision application there is a nonlinear correction function with change the pure rectangle extraction values of the three resistors depending on the width ratio of the tap to the bar.