> > > > Changed my mind. After a posting from Linus on dri-devel and a discussion > > about integer overflow (undefined) in C the following came out: > > Is integer overflow behaviour really undefined? If yes (I want it to be yes > :), > then, of course, it's the programmer's fault, not the compiler's. If > defined - > then the compiler's. :( >
Signed overflow is undefined per the ANSI C spec. Only unsinged overflow has a defined behaviour. However, the unsigned case is not handled properly on x86 either. c.
