// Otherwise we don't know that the it's okay to zapnot this entire
// byte. Only do this iff we can prove that the missing bits are
// already null, so the bytezap doesn't need to really null them.
- BitsToCheck |= ~Constant & (0xFF << 8*i);
+ BitsToCheck |= ~Constant & (0xFFULL << 8*i);
}
}
}
if (!x) return 0;
unsigned at = CountLeadingZeros_64(x);
uint64_t complow = 1ULL << (63 - at);
- uint64_t comphigh = 1ULL << (64 - at);
- //cerr << x << ":" << complow << ":" << comphigh << "\n";
- if (abs64(complow - x) <= abs64(comphigh - x))
+ uint64_t comphigh = complow << 1;
+ if (x - complow <= comphigh - x)
return complow;
else
return comphigh;