search for: unfinalised

...o support it. All of these can be true even for unratified standard RISC-V extensions, with a caveat on "support". It may not be appropriate to try to police RISC-V fragmentation, but we also shouldn't needlessly add to it. Shipping compiler support may further encourage hardware with unfinalised specifications, and so we should guard it behind suitably discouraging flags and be clear that the implementation will change to match the specification up until it's finalised. Naturally we want as many of the benefits of supporting these extensions upstream with as few downsides as possible....