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bronxzv
New Contributor II
94 Views

using FMA intrinsics

intrinsics for FMA AVX instructions are well explained in theC++ Composer XE 2011 documentation

Intrinsics Reference -> Intrinsics for Intel Advanced Vector Extensions -> Intrinsics for Fused Multiply Add Operations

though these intrinsics are missing in "immintrin.h" and all other such headers apparently, thus a simple question :how can we use these intrinsics ? (a compile flag ? other ?)
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TimP
Black Belt
94 Views

There's no AVX FMA support in current released Intel compilers, so it's strange to see them described in the documentation. Such compilers haven't even reached beta. There's fma support in beta gcc, I believe.
bronxzv
New Contributor II
94 Views

thanks for the information, though it looks rather odd since there is more than 20 pages in the user manual detailing FMA intrinsics
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