Hi, >> Is it fair to conclude that the ~ >> operator, applied to an unsigned char, does produce an int as output >> instead of the input type? > > Yes, this is exactly what the C standard promotion rules require. > > Well, to be exact, they *require* it behaves "as if" it were promoted > to "int", so if the sign extension has no net effect to the result, it > might be left out as well. So in that sense, it might be considered a > "missed optimization" bug in GCC here, but it's probably always hard > to catch all those situations well were the integer promotion could be > bypassed.
I remember vaguely somebody's proposal on this list to write a C++ class for unsigned char in order to "bypass" promotion rules. Has anyone tried that? Just being curious. Richard _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org https://lists.nongnu.org/mailman/listinfo/avr-gcc-list
