24-bit computing: Difference between revisions

Revision as of 07:50, 3 June 2020

Revision as of 07:52, 3 June 2020

Line 19:

[[Engineering Research Associates]] (later merged into [[UNIVAC]]) designed a series of 24-bit [[drum memory]] machines including the Atlas, its commercial version the [[UNIVAC 1101]], the [[ATHENA computer]], the [[UNIVAC 1824]] guidance computer, etc. Those designers selected a 24-bit word length because the Earth is roughly 40 million feet in diameter, and an [[intercontinental ballistic missile]] guidance computer needs to do the [[Earth-centered inertial]] navigation calculations to an accuracy of a few feet.<ref>{{cite web |url=http://vipclubmn.org/CP24bit.html |title=UNIVAC 24-bit computer genealogy}}</ref>{{failed verification|date=October 2017}}

[[OpenCL]] has a built-in intrinsicsintrinsic for multiplication (<code>mul24()</code>) with two 24-bit multiplicationintegers, thatreturning area 32-bit result. It is typically much faster than the full-lengtha 32-bit calculationmultiplication.<ref>{{cite web |title=integerFunctions(3) Manual Page |url=https://www.khronos.org/registry/OpenCL/sdk/2.2/docs/man/html/ctz.html |website=www.khronos.org}}</ref>

== See also ==