At least on 68k, the behavior is defined. http://www.tigernt.com/onlineDoc/68000.pdf http://www.tigernt.com/onlineDoc/68000.pdf I suppose the point is the beh

At least on 68k, the behavior is defined. http://www.tigernt.com/onlineDoc/68000.pdf http://www.tigernt.com/onlineDoc/68000.pdf I suppose the point is the behavior undefined in C/C++, so you have to look at the chip level doc to see...or test it yourself.