Loop Combination - English Dictionary

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Loop Combination - English Dictionary

 





1. loop combination A program transformation where the bodies of two loops are merged into one thus reducing the overhead of manipulating and testing the control variable and branching. Further optimisation of the merged code may then become possible. In horizontal loop combination the bodies of the loops are largely independent so only the loop overhead is saved. Vertical loop combination applies where the results of the first loop are used by the second. Combining the two allows the intermediate results to be used immediately in registers rather than requiring them to be stored in an array. The functional equivalent of horizontal and vertical loop combination are tupling and fusion. loop fusion See loop combination. LOOPN A compiler, simulator, and associated source control for an object-oriented Petri net language developed by Charles Lakos at the University of Tasmania. In LOOPN, a Petri net is an extension of a coloured timed Petri net. The extension means firstly that token types are classes. In other words, they consist of both data fields and functions, they can be declared by inheriting from other token types, and they can be used polymorphically. The object-oriented extensions also mean that module or subnet types are classes. LOOPN has been developed over a period of about five years at the University of Tasmania, where it has been used in teaching computer simulation and the modelling of network protocols. ftp://ftp.cs.adelaide.edu.au/pub/OPN/loopn/.


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