Editing Prolog (section)

=== Implementation in hardware ===
During the [[Fifth Generation Computer Systems project]], there were attempts to implement Prolog in hardware with the aim of achieving faster execution with dedicated architectures.<ref>{{Cite book |first5=K. |last5=Kiriyama |page=100 |doi=10.1145/30350.30362 |year=1987 |first4=K. |last4=Kurosawa |last2=Bandoh |first1=S. |first2=T. |title=Proceedings of the 14th annual international symposium on Computer architecture - ISCA '87 |last3=Yamaguchi |first3=S. |last1=Abe |chapter=High performance integrated Prolog processor IPP |isbn=978-0-8186-0776-9 |s2cid=10283148}}</ref><ref>{{cite conference |first=Ian |last=Robinson |isbn=978-3-540-16492-0 |doi=10.1007/3-540-16492-8_73 |title=A Prolog processor based on a pattern matching memory device |conference=Third International Conference on Logic Programming |series=Lecture Notes in Computer Science |publisher=Springer |volume=225|pages=172–179 |year=1986}}</ref><ref>{{Cite journal |journal=ACM SIGPLAN Notices |title=Performance and architectural evaluation of the PSI machine |volume=22 |page=128 |doi=10.1145/36205.36195 |year=1987 |last1=Taki |first4=M. |last2=Nakajima |first1=K. |last4=Ikeda |first2=K. |last3=Nakashima |first3=H. |issue=10 |doi-access=free}}</ref> Furthermore, Prolog has a number of properties that may allow speed-up through parallel execution.<ref>{{Cite journal |last1=Gupta |first1=G. |last2=Pontelli |first2=E. |last3=Ali |first3=K. A. M. |last4=Carlsson |first4=M. |last5=Hermenegildo |first5=M. V. |year=2001 |journal=[[ACM Transactions on Programming Languages and Systems]] |title=Parallel execution of prolog programs: a survey |volume=23 |page=472 |doi=10.1145/504083.504085 |issue=4 |s2cid=2978041 |url=http://oa.upm.es/11160/ |doi-access=free}}</ref> A more recent approach has been to compile restricted Prolog programs to a [[field programmable gate array]].<ref>{{Cite web|url=http://www.cl.cam.ac.uk/~am21/research/sa/byrdbox.ps.gz|title=Statically Allocated Systems}}</ref> However, rapid progress in general-purpose hardware has consistently overtaken more specialised architectures.

In 1982, computers operated at around 10,000 to 100,000 LIPS [logical inferences per second]. The FGCS planned to produce computers operating at 0.1 to 1 GLIPS.<ref>{{Cite book |last1=Bramer |first1=M. A. |url=https://archive.org/details/fifthgenerationa0000bram |title=The fifth generation: an annotated bibliography |last2=Bramer |first2=Dawn |date=1984 |publisher=Addison-Wesley |isbn=978-0-201-14427-7 |location=Wokingham, England ; Reading, Mass |pages=6}}</ref> The Institute for New Generation Computer Technology documents estimated that 1 LIP took about 100 operations on a conventional computer. The plan was to produce at the end of the project (in 1992) a machine with 1000 processors achieving 1 GLIPS, implying at least 1 MLIPS per processor.<ref>{{Cite journal |last1=Feigenbaum |first1=Edward |last2=Shrobe |first2=Howard |date=1993-07-01 |title=The Japanese national Fifth Generation project: Introduction, survey, and evaluation |journal=Future Generation Computer Systems |series=FGCS Conference |volume=9 |issue=2 |pages=105–117 |doi=10.1016/0167-739X(93)90003-8 |issn=0167-739X|doi-access=free }}</ref>

[[Sega]] implemented Prolog for use with the Sega AI Computer, released for the Japanese market in 1986. Prolog was used for reading [[natural language]] inputs, in the [[Japanese language]], via a [[touch pad]].<ref>{{cite magazine |date=March 26, 1987 |title=Software that takes games seriously |magazine=[[New Scientist]] |publisher=[[Reed Business Information]] |via=[[Google Books]] |page=34 |url=https://books.google.com/books?id=RI51dkpbcGoC&pg=PA34 }}{{Dead link|date=November 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>