| 摘要 |
A methodology for generating structural descriptions of complex digital devices from high-level descriptions and specifications is disclosed. The methodology uses a systematic technique to map and enforce consistency of the semantics imbedded in the intent of the original, high-level descriptions. The design activity is essentially a series of transformations operating upon various levels of design representations. At each level, the intended meaning (semantics) and formal software manipulations are captured to derive a more detailed level describing hardware meeting the design goals. Important features of the methodology are: capturing the users concepts, intent, specification, descriptions, constraints and trade-offs; architectural partitioning; what-if analysis at a high level; sizing estimation; timing estimation; architectural trade-off; conceptual design with implementation estimation; and timing closure. The methodology includes using estimators, based on data gathered over a number of realized designs, for partitioning and evaluating a design prior to logic synthesis. From the structural description, a physical implementation of the device is readily realized. A matrix of milestones (goals in the design activity) is defined by degree of complexity (level of abstraction) of a design and for progressive stages (levels) of design activity (from concept through implementation). The milestones are defined using continuous refinement, and the design activity proceeds towards subsequent milestones. As milestones are achieved, previous design activity becomes unalterable. A feasibility stage is key to convergence of the process. Single level or multi-level estimators determine the direction of the process.
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