Jit64: add FMA4 support to fmaddXX

[Tilka]

AMD's Bulldozer processors are the only CPUs that support FMA4 but not FMA3. I'd say we support it until it gets in the way.

[MayImilae]

It's a performance improvement for AMD, right? If so, can we get someone with an AMD chip to test it and see how much it helps?

[Icekhaos]

I'm all for this. I have an FX 8150 to test this with if you are interested.

[Tilka]

@Icekhaos Assuming you use Windows: http://dl.dolphin-emu.org/prs/pr-2496-dolphin-latest-x64.7z

[dolphin-emu-bot]

FifoCI detected that this change impacts graphical rendering. Here are the behavior differences detected by the system:

• fog-adj on dx-win-nv: failed to render

_{^{automated-fifoci-reporter}}

[Icekhaos]

Which games are fmadd intensive?

[Tilka]

No idea, but I'm more interested in whether this introduces any bugs/crashes rather than performance.

[Icekhaos]

Well, thinking back, we DID have fmadd issues with Mario Kart. Meanwhile I go looking through my brother's Wii library for it, I would like to have a console recorded playback, if that could be done.

[Tilka]

Ping. Any issues with this? I'm going to merge this tomorrow if nothing crops up.

[ghost]

This apparently does cause issues: https://code.google.com/p/dolphin-emu/issues/detail?id=8640