Function __rte_raw_cksum_reduce

dpdk/lib/net/rte_ip.h:193–199

* @internal Reduce a sum to the non-complemented checksum. * Helper routine for the rte_raw_cksum(). * * @param sum * Value of the sum. * @return * The non-complemented checksum. */

 *   The non-complemented checksum.
 */
static inline uint16_t
__rte_raw_cksum_reduce(uint32_t sum)
{
	sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
	sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
	return (uint16_t)sum;
}

/**
 * Process the non-complemented checksum of a buffer.