wait a minute isn't BD using fma instructions?Originally Posted by -Sweeper_
wait a minute isn't BD using fma instructions?
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FMAC, other thing...
Actually it is FMA, but without software support it useless.. just as AVX.
And as we see software hardly useses any of the new insturctions (SSSE3, SSE4.x) when not both cpus support it, we'll see the same for the first FMA implementation in BD. At least both sopport AVX so that will get some use.
Last edited by Hornet331; 08-29-2010 at 05:48 PM.
I don't think FMA was planned to be in the first version of Intel's AVX, so I'm not entirely sure what the situation is. But this info is like third hand from back when I wanted to know about the Tock after the first i7's.
If it's in Bulldozer, then I guess Intel decided to use it first time round, if not then maybe it's because AMD decided to match Intel for functionality.
Yes, a 4-operand form. Intel is supporting a 3-operand form starting with Haswell.
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