Function InverseMaskLowerBits

util/generic/bitops.h:260–262

* Return 64-bit mask with all bits set except for `bits` lower bits. */

 * Return 64-bit mask with all bits set except for `bits` lower bits.
 */
Y_FORCE_INLINE ui64 InverseMaskLowerBits(ui64 bits) {
    return ::NBitOps::NPrivate::INVERSE_WORD_MASK[bits];
}

/*
 * Return 64-bit mask with all bits set except for `bits` bitst starting from `skipbits`.