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The Computer Journal 1986 29(6):495-499; doi:10.1093/comjnl/29.6.495
© 1986 by British Computer Society
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Automatic Specialisation of Standard Designs

W. F. Clocksin *

Computer Laboratory, University of Cambridge, Corn Exchange Street, Cambridge CB2 3QG, UK

We introduce a technique, called specialisation, for automatically performing a certain class of optimisation in hierarchically specified designs composed of standard modules. Modules are subject to specialisation when they provide facilities that are not used in a design. This situation is not uncommon in ‘gate array’ and ‘standard cell’ designs used in VLSI circuits. New definitions of modules are collected in a library as they are constructed so that detailed processing need not be repeated when the same specialisation is required elsewhere in a design. The technique has been implemented in Prolog. For explanatory purposes the technique has been applied here to specialising ‘standard cell’ specifications, but the technique is generally applicable for rewriting arbitrary specifications written as collections of Horn clauses.

Received November 1985.

* Computer Laboratory, University of Cambridge, Corn Exchange Street, Cambridge CB2 3QG


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