Assignment of select I/O objects to banks with mixed capacities using integer linear programming

A machine readable storage medium having stored thereon a computer program having a plurality of code sections for causing a computer to assign input/output objects of a circuit design to banks of a target device, the machine readable storage medium comprising:

• code for assigning the I/O objects of the circuit design to I/O groups according to compatibility among the I/O objects, wherein compatibility is determined according to an I/O standard associated with each I/O object;
• code for establishing a plurality of relationships regulating assignment of the I/O objects of the I/O groups to banks of the target device, wherein the plurality of relationships allow different numbers of I/O objects to be assigned to different banks of the target device;
• and
• code for determining whether a feasible solution exists for assignment of the I/O objects of the circuit design to banks of the target device by minimizing an objective function while observing the plurality of relationships, wherein:
• the code for establishing a plurality of relationships comprises code for defining a plurality of resource constraints enabled to be expressed as
• ∑
• p
• =
• 1
• N
• ⁢
• X
• ip
• =
• N
• i
• ,
• wherein Xip indicates a number of I/O objects from a selected I/O group Gi that are allocated to a selected bank Bp, Ni represents a total number of I/O objects of a same I/O standard as Gi, and N represents a total number of banks in the target device.