- Any extended integer types that exist in the implementation (6.2.5).
- Whether signed integer types are represented using sign and magnitude,
two's complement, or one's complement, and whether the extraordinary value
is a trap representation or an ordinary value (126.96.36.199).
- The rank of any extended integer type relative to another extended
integer type with the same precision (188.8.131.52).
- The result of, or the signal raised by, converting an integer to a
signed integer type when the value cannot be represented in an object of
that type (184.108.40.206).
- The results of some bitwise operations on signed integers (6.5).