Design of a Three-Level Cross-Verification Coverage Model for Complex IP Verification

To address the challenge of comprehensive coverage for various functional combinations in the verification process of complex IPs, this paper proposes a Three-Level cross-verification coverage model design approach. The Three-Level cross-verification coverage model design approach is applied to the coverage collection of a Vector Computation Unit(VCU) in a Network Processing Unit (NPU). Within the Universal Verification Methodology(UVM) verification platform, a Three-Level cross-verification coverage model is designed to ensure complete coverage of all functional combinations within the VCU, thereby ensuring functional completeness of the designed VCU. Experimental results demonstrate that this coverage model effectively covers all functional combinations systematically, reduces coverage collection time, and potentially reduces the volume of functional test case design in the verification process.