Floating-point unit: Difference between revisions

Revision as of 02:49, 27 February 2022

Revision as of 09:32, 27 February 2022

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Floating-point operations are often [[instruction pipelining|pipelined]]. In earlier [[superscalar]] architectures without general [[out-of-order execution]], floating-point operations were sometimes pipelined separately from integer operations.

The modular architecture of [[Bulldozer (microarchitecture)|Bulldozer microarchitecture]] uses a special FPU named FlexFPU, which uses [[simultaneous multithreading]]. Each physical integer core, two per module, is single-threaded, in contrast with Intel's [[Hyperthreading]], where two virtual simultaneous threads share the resources of a single physical core.<ref>https://web.archive.org/web/20150509204809/http://cdn3.wccftech.com/wp-content/uploads/2013/07/AMD-Steamroller-vs-Bulldozer.jpg {{Dead link|date=February 2022}}</ref><ref>{{cite web |url=https://www.bit-tech.net/news/hardware/2010/10/28/amd-unveils-flex-fp/1 |title=AMD unveils Flex FP |website=bit-tech.net |access-date=29 March 2018}}</ref>

== {{anchor|Floating-point emulation}}Floating-point library ==