I like RISC-V (it's been my job for the last 7 years) but this is nonsense. Not everything RISC-V is good. CLIC was awful (thankfully it has been abandoned). The spec is not especially well written - the style is inconsistent due to being written by many authors, and it is waaaay too much of a textbook rather than a proper spec. (There is some ongoing work to improve this tbf.)
There's a practically unending list of undefined/implementation defined behaviours, which is great if you want to implement an ultra minimal microcontroller with 100 flops, but pretty awful otherwise.
Requiring the C (compressed) extension in the RVA profiles was definitely a mistake. The lack of true 16/64kB pages and conditional moves are probably a mistake (though fixable).
I don't know how any of these make it more robust and mature.
(But to be clear, I still think it's pretty good overall.)
alt Hacker News
I like RISC-V (it's been my job for the last 7 years) but this is nonsense. Not everything RISC-V is good. CLIC was awful (thankfully it has been abandoned). The spec is not especially well written - the style is inconsistent due to being written by many authors, and it is waaaay too much of a textbook rather than a proper spec. (There is some ongoing work to improve this tbf.)
There's a practically unending list of undefined/implementation defined behaviours, which is great if you want to implement an ultra minimal microcontroller with 100 flops, but pretty awful otherwise.
Requiring the C (compressed) extension in the RVA profiles was definitely a mistake. The lack of true 16/64kB pages and conditional moves are probably a mistake (though fixable).
I don't know how any of these make it more robust and mature.
(But to be clear, I still think it's pretty good overall.)