NDLI: Combinatorial sketching for finite programs (CARN, Vol. 34, Issue. 5)

Content Provider	ACM Digital Library
Author	Bodik, Rastislav Tancau, Liviu Seshia, Sanjit Saraswat, Vijay Solar-Lezama, Armando
Abstract	Sketching is a software synthesis approach where the programmer develops a partial implementation - a sketch - and a separate specification of the desired functionality. The synthesizer then completes the sketch to behave like the specification. The correctness of the synthesized implementation is guaranteed by the compiler, which allows, among other benefits, rapid development of highly tuned implementations without the fear of introducing bugs.We develop SKETCH, a language for finite programs with linguistic support for sketching. Finite programs include many highperformance kernels, including cryptocodes. In contrast to prior synthesizers, which had to be equipped with domain-specific rules, SKETCH completes sketches by means of a combinatorial search based on generalized boolean satisfiability. Consequently, our combinatorial synthesizer is complete for the class of finite programs: it is guaranteed to complete any sketch in theory, and in practice has scaled to realistic programming problems.Freed from domain rules, we can now write sketches as simpleto-understand partial programs, which are regular programs in which difficult code fragments are replaced with holes to be filled by the synthesizer. Holes may stand for index expressions, lookup tables, or bitmasks, but the programmer can easily define new kinds of holes using a single versatile synthesis operator.We have used SKETCH to synthesize an efficient implementation of the AES cipher standard. The synthesizer produces the most complex part of the implementation and runs in about an hour.
Starting Page	404
Ending Page	415
Page Count	12
File Format	PDF
ISSN	01635964
DOI	10.1145/1168919.1168907
Journal	ACM SIGARCH Computer Architecture News (CARN)
Volume Number	34
Issue Number	5
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1981-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sat Sketching
Content Type	Text
Resource Type	Article

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