| Autor: |
Kage, Tetsuro, Shimogori, Shintaro |
| Předmět: |
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| Zdroj: |
Systems & Computers in Japan; Jul88, Vol. 19 Issue 7, p82-92, 11p, 7 Diagrams, 4 Charts, 4 Graphs |
| Abstrakt: |
This paper presents a vectorization processing method for circuit analyses using a vector computer. It had been difficult in circuit analyses to evaluate device models with an adequately long vector length, which is the most expensive task in the computation. Therefore use of a vector computer could improve the computation time only a few times. In the proposed method, the evaluation of device models is carried out at the level of a basic element and each evaluation is vectorized throughout the circuit matrix. It is shown that neither the forward nor backward substitutions can be ignored in solving a sparse matrix with the LU decomposition method. Therefore, the vectorization is applied to the whole matrix-solving process. These algorithms are realized in a user-defined model circuit analysis program FINAP-VP. As a result, all the main processes of the analysis loop are vectorized with the length of the order of a hundred to ten thousand so that the analysis time for the scalar mode was improved by a factor of more than 10. This paper describes the method of vectorization of the device-models evaluation and the circuit matrix solution (which are the main process in a circuit analysis). The results of the benchmark tests using the vector-computer FACOM-VP, are also described. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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