xxhash
__u32 xxhash;
U64 const xxhash = xxh64(split, minMatchLength, 0);
U32 const hash = (U32)(xxhash & (((U32)1 << hBits) - 1));
entry.checksum = (U32)(xxhash >> 32);
U64 const xxhash = xxh64(split, minMatchLength, 0);
U32 const hash = (U32)(xxhash & (((U32)1 << hBits) - 1));
candidates[n].checksum = (U32)(xxhash >> 32);
checksum = xxhash(addr, PAGE_SIZE, 0);