Hi! On Mon, Jul 14, 2025 at 10:29:29PM +0800, Imple Lee via Gcc-help wrote: > The relevant documentation is as follows. > > > The result of the comparison is a vector of the same width and number of elements as the comparison operands with a signed integral element type. > > However, on architectures where different integral types have the same > width, e.g. `long` and `long long` are both 64-bit on x86-64 linux, it > is unclear which type will be used (on x86-64 linux, the type of both The documentation describes what the mode of the result is, i.e. how many bits and that kind of thing -- not what the type is, a C concept. This is useful for many more users than just those that care for C. It also is useful for backend developers and developers of machine-specific stuff. But yeah, the type used should be described somewhere. Possibly in some other place than you were looking (it wasn't clear to me where that was): you need to find something about "the binding to the C language". Segher
