A Waveform Storage Method Based on Priority Grouping
A waveform storage and priority technology, which is applied in the direction of instruments, file access structure, calculation, etc., can solve the problem of long time to read data from waveform files, and achieve the effect of shortening the design cycle, reducing time, and speeding up
Active Publication Date: 2020-07-10
北京华大九天科技股份有限公司
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[0004] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a waveform storage method based on priority grouping. Aiming at the problem that the waveform files generated by the current integrated circuit simulation are too large, which leads to too long time to read data, in the circuit During the simulation process, by setting priority and grouping the signals, and then outputting the data to multiple data files in order, and recording the corresponding index information at the same time, the reading and access speed of the waveform data is accelerated, and the accuracy of the simulation results is improved. Verification efficiency
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[0033] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0034] figure 1 For the waveform storage method flow chart based on priority grouping according to the present invention, reference will be made below figure 1 , the waveform storage method based on priority grouping of the present invention will be described in detail.
[0035] In step 101, determine the names and importance of all the signals that need to be output in the circuit; then generate a priority file "priority.txt", and set the priority values of all signals according to the storage format. In order to facilitate the description of the following steps, here Assume that only 4 priority values are set, namely 1, 2, 3, and 4; finally, add an option in ...
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The invention relates to a waveform storage method based on priority grouping, which comprises the following steps of setting a priority and grouping according to names and importance of all signals needing to be output in a circuit, generating a priority file and adding the priority file into a netlist file; reading and analyzing a priority file in the netlist file, establishing an index file, and writing a field value into the index file; establishing a data file, and sequentially writing the signal data into corresponding files according to a data storage format; updating index files. According to the waveform storage method based on the priority grouping, the time for reading waveform data is shortened, the verification efficiency of a simulation result is greatly improved, the designperiod of an electronic circuit is shortened, and the method adapts to rapid increase of the circuit scale.
Description
technical field [0001] The invention relates to the technical field of integrated circuit automation product design, in particular to a waveform storage method in a circuit simulation process. Background technique [0002] Circuit simulation is an important means of functional verification of integrated circuits. With the rapid increase of the scale of integrated circuits, the waveform files generated by circuit simulation verification are also getting larger and larger. In the timing analysis and simulation process of analog circuits, when the number of nodes reaches more than 100,000, the generated waveform data can reach several gigabytes to tens of gigabytes, and the amount of data is extremely huge. In actual circuit design, it may be necessary to perform multiple simulations on the circuit to optimize the circuit, and the waveform data to be stored is even larger. After the circuit simulation is completed, it is generally necessary to check whether the properties of ...
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IPC IPC(8): G06F16/13G06F30/398
CPCG06F30/398
Inventor 郭根华吴大可徐启迪何西华
Owner 北京华大九天科技股份有限公司