From: Bonita.Montero@nospicedham.gmail.com   
      
   > FMA4 works on my 2700X. Question is: is that supported   
   > still on Zen2?   
   > Instructions are not reported at all by cpuid but works.   
   > I had some nice speedup with FMA4 on Zen.   
   > I don't know why FMA3 won when FMA4 is clearly superior?   
      
   When dealing with floating-point-operations you have a lot of   
   instructions with long latencies. Even if you have parallel chains   
   of instructions that could be pipelined, there are mostly oppurtu-   
   nities to hide movs that might be necessary to prevent overwriting   
   registers. And often their value isn't needed to be remembered. So   
   your speedup could be only slightly and sometimes there's nothing   
   at all.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)