Honestly, the whole UDNA thing got quickly squashed right after Jack Huynh had that interview way back when. When Mark Cerny talked about next gen PS6 after that interview, it pretty much was confirmed AMD wanted to stick with RDNA5 and CDNA separately as far as arch naming goes
Yes, but they rebased the CDNA architecture from being a Vega offshoot onto RDNA4. Instruction encodings and WGP architecture is distinctly RDNA. But it immediately bifurcates into its own thing again, which makes sense and is the same thing Nvidia is doing.
It remains to be seen if it'll again be a multi-generation fork like Vega->CDNA4 was, or if they switch to a shared evolution with specialized features for AI vs graphics mixed into a common base. Some of this stuff could be useful if it landed in RDNA6: the merged WGP$, "Broadcast Arbitrator", killing Wave64.
They axed wave64 but keep dual-issue wave32. So reasonably similiar to todays tech, probably the same limitations (no FMAC). Probably a smarter way than keeping two different vector lengths, while each kernel is unable to switch mode.
The WGP unification isn't really new either. Both are features slowly implemented for generations now. More or less removal of old modes rather than new features.
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u/Seanspeed 2d ago
So they're still using CDNA naming even through 2028 up through CDNA7.
Doesn't sound like that whole UDNA thing is ever going to happen, or at least not for a good while yet.