US4833619A
Expired / Lapsed
US
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Automatic logic design system
Assignee: Hitachi Ltd
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Filing: 1986-12-24
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Granted: 1989-05-23
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Expires: 2006-12-24
Abstract
Abstract Herein disclosed is an automatic design system for automatically generating a data structure, which is only implicitly expressed by a logic specification description, by deriving, in case a logic system has data structures of similar constructions, one data structure from the structure description and transfer behavior description of the other data structure.
Inventors
- 👤 Tsuguo Shimizu
- 👤 Yoshio Takamine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:13
CPC Classifications
G; G06; G06F; G06F30/00; G06F30/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
184 words
An automatic logic design system for accomplishing the logic design of a hardware system by a computer, comprising: a logic specification file comprising structure and behavior descriptions of a logic system; a syntax analysis subsystem for receiving the structure and behavior descriptions from said logic specification file and having a syntax rule for analyzing the structure and behavior descriptions; structure description table means for storing results of analyzing the structure description in the syntax analysis subsystem; behavior description table means for storing results of analyzing the behavior description in the syntax analysis subsystem along with a key word indicating necessity for generating a data structure comprising logic elements; a data structure generation subsystem having means for retrieving from said behavior description table means a location where the data structure should be generated, means for seeking an original form of the data structure in the structure description table, and means for deciding the data structure on the basis of the original form using the key word; and data structure generation result table means for storing the data structure obtained from the data structure generation subsystem.
Claim 2
Dependent Claim
184 words
An automatic logic design system for accomplishing the logic design of a hardware system by a computer, comprising: a logic specification file comprising structure and behavior descriptions of a logic system; a syntax analysis subsystem for receiving the structure and behavior descriptions from said logic specification file and having a syntax rule for analyzing the structure and behavior descriptions; structure description table means for storing results of analyzing the structure description in the syntax analysis subsystem; behavior description table means for storing results of analyzing the behavior description in the syntax analysis subsystem along with a key word indicating necessity for generating a data structure comprising logic elements; a data structure generation subsystem having means for retrieving from said behavior description table means a location where the data structure should be generated, means for seeking an original form of the data structure in the structure description table, and means for deciding the data structure on the basis of the original form using the key word; and data structure generation result table means for storing the data structure obtained from the data structure generation subsystem.
Claim 3
Dependent Claim
28 words
An automatic logic design system according to claim 1, wherein said data structure generation result table comprises means for eliminating a redundant logic element in the data structure.
Claim 4
Dependent Claim
28 words
An automatic logic design system according to claim 1 wherein said data structure generation result table comprises means for registering a novel logic element in the data structure.
Claim 5
Dependent Claim
33 words
An automatic logic design system according to claim 1, wherein said data structure generation result table comprises means for changing a source and a destination of each logic element in the data structure.
Claim 6
Independent Claim
140 words
A method of conducting the logic design of a hardware system by a computer, comprising the steps of: filing structure and behavior descriptions of a logic system; analyzing the structure and behavior descriptions in accordance with a syntax rule file; storing results of analyzing the structure description into a first table; storing results of analyzing the behavior description into a second table along with a key word indicating necessity for generating a data structure comprising logic elements; retrieving from said second table a location where the data structure should be generated; seeking an original form of the data structure in the first table; deciding the data structure on the basis of the original form using the results stored in the second table and the key word; and storing the data structure obtained from the deciding step into a third table.
Claim 7
Independent Claim
140 words
A method of conducting the logic design of a hardware system by a computer, comprising the steps of: filing structure and behavior descriptions of a logic system; analyzing the structure and behavior descriptions in accordance with a syntax rule file; storing results of analyzing the structure description into a first table; storing results of analyzing the behavior description into a second table along with a key word indicating necessity for generating a data structure comprising logic elements; retrieving from said second table a location where the data structure should be generated; seeking an original form of the data structure in the first table; deciding the data structure on the basis of the original form using the results stored in the second table and the key word; and storing the data structure obtained from the deciding step into a third table.
Claim 8
Dependent Claim
20 words
A method according to claim 5, further comprising the step of eliminating a redundant logic element in the data structure.
Claim 9
Dependent Claim
20 words
A method according to claim 5, further comprising the step of registering a novel logic element in the data structure.
Claim 10
Dependent Claim
25 words
A method according to claim 5, further comprising the step of changing a source and a destination of each logic element in the data structure.
References Cited (Backward Citations)
US4613940A
Cited
US4600995A
Cited
US4584653A
Cited
US4580228A
Cited
US4612618A
Cited
US4638442A
Cited
US4636965A
Cited
US4651284A
Cited
US4752887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |