Vitaly Burovoy <vitaly.burovoy@gmail.com> writes:
> I'm sorry for the offtopic, but does anyone know a reason why a
> condition in mac.c
>> if ((a < 0) || (a > 255) || (b < 0) || (b > 255) ||
>> (c < 0) || (c > 255) || (d < 0) || (d > 255) ||
>> (e < 0) || (e > 255) || (f < 0) || (f > 255))
> can not be rewritten as:
>> if (((a | b | c | d | e | f) < 0) ||
>> ((a | b | c | d | e | f) > 255))
Well, it's ugly and it adds a bunch of assumptions about arithmetic
behavior that we don't particularly need to make. If this were some
amazingly hot hot-spot then maybe it would be worth making the code
unreadable to save a few nanoseconds, but I doubt that it is.
(Anyway, you've not shown that there actually is any benefit ...)
regards, tom lane