is there any word processing software for the pdp11?

On Tue, Dec 02, 2014 at 03:32:38PM -0800, Fred Cisin wrote: [...] That basically depends on what "long long" and "int" means :) The C99 (draft) standard says of << and >> that "[t]he behavior is undefined if the right operand is negative, or greater than or equal to the length in bits of the promoted left operand", with the C++ standard using much the same words but in a different order. There are all sorts of edge cases and caveats in the standard, but I've not omitted anything relevant. So on systems where sizeof(int) <= sizeof(int32_t) -- which is everything that matters -- B << 32 is undefined and the compiler is permitted to do whatever it damn well pleases, including invoking the infamous "nasal demons". What *actually* happens depends on the compiler. Modern aggressive compilers will go as far as to prove which code paths contain undefined behaviour and thus treat so-affected variables and expressions as "poisoned". B would be treated as unused here and its assignment would be optimised-away if not used elsewhere. A would be treated as uninitialised, and thus potentially poison anything that uses it, cascading the undefined behaviour further, allowing whole swathes of code to be eliminated. With some of the compiler smarts migrating into linkers, it may even take a crack at the halting problem and optimise the whole program away because the standard allows it to! (I am very much not a fan of C, but it helps to know one's enemies.)