Julien> Not very important but ((get_random_int() % 4096) << 4) Julien> could be optimized into get_random_int() & 0xFFF0.
HPA> .. and gcc knows that. HPA> 8: 25 ff 0f 00 00 and $0xfff,%eax HPA> d: 83 c4 0c add $0xc,%esp HPA> 10: c1 e0 04 shl $0x4,%eax Actually gcc isn't quite that smart (since it obviously can't understand the semantics of get_random int()). The original point was that the "shl $0x4" can be avoided by directly &'ing with 0xfff0, not that "% 4096" can be strength reduced to "& 0xfff". - R. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/