built-in support for overflow is not really builtin. There's only adc, but the C library has no such function, and compilers only got them added a few years ago

built-in support for overflow is not really builtin. There's only adc, but the C library has no such function, and compilers only got them added a few years ago. Almost nobody uses them, as they introduce a dependency. Most workaround that in much slower ways, worse than RISC-V