Socionext Inc.

Fujitsu Semiconductor Limited

Atsushi Yasunaka

Kimitoshi Niratsuka

A design method including a high level synthesis process that has (1) generating a hardware description of a circuit and high level synthesis report information from a source code based on a high level synthesis constraint, the hardware description describing a circuit including a plurality of stages and inter-stage registers; (2) determining a bypass stage selection pattern based on bypass constraint information including a constraint condition related to a bypass of the inter-stage register and the high level synthesis report information, the bypass stage selection pattern including a plurality of patterns each pattern having a combination of stages of inter-stage registers for which bypass setting is performed among stages of a bypass setting-capable inter-stage registers; and (3) generating bypass report information based on the bypass stage selection pattern, the bypass report information including combination information of the inter-stage registers for which the bypass is performed setting corresponding to a predetermined priority condition.

Method, design program, and design apparatus of a high level synthesis process of a circuit

An analysis unit analyzes a source code representing design data of a semiconductor device, and generates information (CDFG information) indicating the data and control flow of the semiconductor device. A high-level synthesis data generation unit acquires intermediate data (an object file), which is obtained by compiling the source code, generates intermediate data (an object file) by incorporating the CDFG information generated by the analysis unit into the acquired intermediate data, and outputs the generated intermediate data as high-level synthesis data.

High-level synthesis data generation apparatus, high-level synthesis apparatus, and high-level synthesis data generation method

A high-level synthesis device, which converts a behavior description file describing a function of an integrated circuit using a high-level language without timing description, into a hardware description file describing the integrated circuit including timing description, has: a processor; a high-level synthesis unit in which the processor converts a behavior description file having a functional portion describing the function and a control portion controlling timing, into a first hardware description file; a variable extraction unit; a loop information generation unit; a static latency extraction unit; a latency calculation circuit generation unit in which the processor generates a second hardware description file describing a latency calculation circuit which generates the latency information based on loop count and static latency; and an insertion unit in which the processor inserts the second hardware description file into the first hardware description file to generate a third hardware description file.

Growing community of inventors

Higashiosaka, Japan

Atsushi Yasunaka