The very first Skakti test chip didn't support C. All their following ones do. Vega doesn't seem to be supporting C extension. A very bad decision, if true. C

The very first Skakti test chip didn't support C. All their following ones do. Vega doesn't seem to be supporting C extension. A very bad decision, if true. C is not expensive to support, and certainly cheaper than building larger icache to make up for not supporting it -- let alone the cost of compiling your own Linux distro if you don't support C. I'm not aware of a single commercially-produced RISC-V microcontroller that doesn't support the C extension, so there's no reason at all that something with MMU and FPU wouldn't. Leaving it out is just something that is possible for student projects and to simplify early teaching, not something that is a good idea to do in real life.