DERIVING COST-FUNCTIONS FROM CELL LIBRARIES AND REAL ICS TO ALLOW REAL AREA-POWER-DELAY TRADE-OFF IN EARLY STAGES OF LOGIC SYNTHESIS

To allow real performance-driven logic synthesis, area, power and dela y trade-off should be considered from the very early stages of the syn thesis process. Accurate models must be provided for area occupation, delay, and power dissipation. Moreover, the model parameters should be available during all stages of logic synthesis. In this paper we pres ent the models and derive cost functions to calculate their parameters . At the early stages of logic synthesis, generic cell library informa tion and statistical data extracted from real integrated circuits (IC) are used to calculate the model parameters. As the synthesis process progress, technology dependent information becomes available and the m odel parameters are gradually refined.