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The FMA instruction set is an extension to the 128 and 256-bit Streaming SIMD Extensions instructions in the x86 microprocessor instruction set to perform fused multiply–add (FMA) operations.[1] There are two variants:
FMA4 is supported in AMD processors starting with the Bulldozer architecture. FMA4 was performed in hardware before FMA3 was. Support for FMA4 has been removed since Zen 1.[2]
FMA3 is supported in AMD processors starting with the Piledriver architecture and Intel starting with Haswell processors and Broadwell processors since 2014.
^"FMA3 and FMA4 are not instruction sets, they are individual instructions -- fused multiply add. They could be quite useful depending on how Intel and AMD implement them" Woltmann, George (Prime95). "Intel AVX and GIMPS". mersenneforum.org/index.php. Great Internet Mersenne Prime Search (GIMPS) project. Retrieved 27 July 2011.{{cite web}}: CS1 maint: numeric names: authors list (link)
^Cite error: The named reference :0 was invoked but never defined (see the help page).
and 25 Related for: FMA instruction set information
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