On 16 March 2012 14:08, Jeffrey Walton wrote: > > I see they are referring to their wonderful abstract machine. That's > the same machine that has unlimited register sizes and never suffers > overflow or wrap. No it isn't. "Certain aspects and operations of the abstract machine are described in this International Standard as implementation-defined (for example, sizeof(int))." Overflow: "If during the evaluation of an expression, the result is not mathematically defined or not in the range of representable values for its type, the behavior is undefined." Wrapping: "Unsigned integers, declared unsigned, shall obey the laws of arithmetic modulo 2^n where n is the number of bits in the value representation of that particular size of integer" Registers are outside the scope of the standard.
