Design methodology for the high-performance G4 S/390 microprocessor

This paper describes the methodology employed in the design of the G4 S/390 microprocessor. Issues of verifying design metrics of power, noise, timing, and functional correctness are discussed within the context of a performance-driven transistor-level custom design approach. Semi-automated techniques to encourage designer productivity consistent with the objectives of a high-frequency deep submicron design point are presented as are the practical issues associated with managing the complexity of an 8 million transistor design.