Agent Skills: SVA Assertions Skill

SVA Assertions Skill

Overview

Expert skill for SystemVerilog Assertions (SVA) development, enabling formal property specification and verification for FPGA designs.

Capabilities

• Write concurrent and immediate assertions
• Create property specifications and sequences
• Implement coverage properties (cover property)
• Create assume properties for formal verification
• Debug assertion failures with cause analysis
• Generate assertion bind files
• Optimize assertion performance
• Integrate assertions with formal tools

Target Processes

• sva-development.js
• constrained-random-verification.js
• uvm-testbench.js
• verilog-systemverilog-design.js

Usage Guidelines

Assertion Types

• Immediate Assertions: Use for procedural checks within always blocks
• Concurrent Assertions: Use for temporal properties across clock cycles
• Cover Properties: Use for functional coverage collection
• Assume Properties: Use for formal verification constraints

Best Practices

• Use $rose, $fell, $stable for edge detection
• Apply disable iff for reset handling
• Use |-> for overlapping implication, |=> for non-overlapping
• Create reusable sequences for common patterns
• Add meaningful labels to all assertions

Performance Optimization

• Limit sequence length for simulation efficiency
• Use local variables in sequences sparingly
• Group related assertions in bind files
• Consider assertion synthesis for emulation

Dependencies

• SVA parser
• Formal verification tool awareness
• IEEE 1800-2017 SystemVerilog standard knowledge