Claus-Justus Heine <[EMAIL PROTECTED]> writes: > (signed long) = (signed int) x (unsigned int) > > Surprisingly the sign is not promoted in this case: > > a = -1 * 20, then a = 0x0000 0000 ffff ffec > > IMHO, this is a bug.
No, it isn't. In this context, -1 is converted to unsigned, yielding
0xffffffff. Then 0xffffffff * 20 is calculated and truncated to
unsigned, and then zero extended to 64 bit.
--
Falk
