Engineering change protocols for behavioral synthesis

Rapid prototyping and development of in-circuit and FPGA-based emulators as key accelerators for fast time-to-market has resulted in a need for fast error correction mechanisms. The fabricated or emulated prototypes upon error diagnosis require quick and as much as possible flexible engineering change (EC). However, this problem has recently initiated research activity mainly in the logic synthesis domain. We introduce the first set of EC protocols for behavioral synthesis. The protocols support both the preand postprocessing EC paradigms. In addition, instead of developing special algorithms for EC which is the adopted research model, as a key contribution, we show that using protocols which facilitate constraint manipulation of the initial design specification there is no need for development of specialized EC algorithms. The EC process is performed using the standard optimization algorithms on the modified design. Nevertheless, as shown on a number of behavioral synthesis tasks including: resource assignment, design partitioning, and operation scheduling, the approach provides variable and guaranteed flexibility for incremental synthesis with minimal hardware overhead.