Cadence Design Systems, Inc.

Sanjeev Saluja

Anmol Mathur

A Huffman algorithm is applied to revise the topology of a data flow graph. The result of the application of the algorithm is an increase in the sizes of at least some clusters (i.e., enhanced mergeability). The Huffman rebalancing of the topology may also result in the benefit of allowing further pruning of the bitwidths of data flow paths, which may further enhance mergeability. Thus, the algorithm may be applied with a maximum information content analysis.

Reducing datapath widths by rebalancing data flow topology

Required precision and information content of datapath signals are used to define functionally safe transformations on data flow graphs. These transformations reduce widths of datapath operators and edges and enhance the mergeability of operators. An algorithm for optimally balancing data flow graph topology to further reduce the data path widths and further enhance mergeability is combined with the above in an iterative algorithm for optimizing DFGs.

Procedure for optimizing mergeability and datapath widths of data flow graphs

A practical definition for determining a required precision is provided and used to reduce the widths of operators and edges of data flow graphs. A bottom-up procedure for systematically pruning data flow graphs is described. The result is shown to enhance the mergeability of subgraphs and provide reduced data path widths. This may result in lower area, power requirements and other benefits as readily understood in the field of circuit design.

Enhancing mergeability of datapaths and reducing datapath widths responsively to required precision

A practical definition for determining an upper bound on information content is provided and used to reduce the widths of operators and edges of data flow graphs. A top down procedure for systematically pruning data flow graphs is described. The result is shown to enhance the mergeability of subgraphs and provide reduced data path widths. This may result in lower area, power requirements and other benefits as readily understood in the field of circuit design.

Growing community of inventors

Jalvayu Vihar, India

Sanjeev Saluja