Editing Orthogonality (section)

===Orthogonal instruction set===
{{Main|Orthogonal instruction set}}

An [[instruction set]] is said to be orthogonal if it lacks redundancy (i.e., there is only a single instruction that can be used to accomplish a given task)<ref>{{cite book|author1=Null, Linda  |author2=Lobur, Julia |name-list-style=amp |title=The essentials of computer organization and architecture|publisher=Jones & Bartlett Learning|edition=2nd|year=2006|isbn=978-0-7637-3769-6|page=257|url=https://books.google.com/books?id=QGPHAl9GE-IC&pg=PA257}}</ref> and is designed such that instructions can use any [[processor register|register]] in any [[addressing mode]]. This terminology results from considering an instruction as a vector whose components are the instruction fields.  One field identifies the registers to be operated upon and another specifies the addressing mode. An [[orthogonal instruction set]] uniquely encodes all combinations of registers and addressing modes.<ref>{{Cite book |last=Linda Null |url=https://samples.jbpub.com/9781449600068/00068_ch05_null3e.pdf |archive-url=https://web.archive.org/web/20151010020907/http://samples.jbpub.com/9781449600068/00068_CH05_Null3e.pdf |archive-date=2015-10-10 |url-status=live |title=The Essentials of Computer Organization and Architecture |publisher=Jones & Bartlett Publishers |year=2010 |isbn=978-1449600068 |pages=287–288}}</ref>