Boots – shoes – and leggings
Patent
1992-06-09
1995-11-14
Coleman, Eric
Boots, shoes, and leggings
364489, G06F 944
Patent
active
054672929
ABSTRACT:
A logical operation method for evaluating a train of output data to be obtained when a plurality of input patterns are successively applied to a memory element whose output value depends upon a sequence of input values. For each of the plurality of patterns in time series, the method decides whether or not the pertinent pattern is a holding pattern which means that the output value of the memory element depends upon a preceding pattern. Subsequently, the method evaluates a first train of data which consists of flags each indicating whether or not the respective pattern is the holding pattern, and a second train of data which consist of a predetermined logical values for the holding patterns and output logical values of the memory element for the non-holding patterns. Finally, the method subjects the first and second trains of data to operations in parallel by the use of a parallel arithmetic unit, thereby obtaining the train of output data of the memory element in parallel. High-speed logic/fault simulations can be realized even for a synchronous sequential circuit with the parallel arithmetic unit such as vector computer. This makes it possible to sharply reduce the number of man-hour and shorten the processing period of time in the verification of logic and the generation of test data.
REFERENCES:
patent: 4769817 (1988-09-01), Krohn et al.
patent: 4899273 (1990-02-01), Omoda et al.
patent: 5051941 (1991-09-01), Takamine et al.
patent: 5184308 (1993-02-01), Nagai et al.
Nagai Masahiko
Nagumo Takaharu
Nishida Takao
Watai Hiroo
Coleman Eric
Donaghue L.
Hitachi , Ltd.
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