in include/hash/xxhash.h [1692:1703]
XXH_FORCE_INLINE xxh_u64 XXH_readLE64(const void* memPtr)
{
const xxh_u8* bytePtr = (const xxh_u8 *)memPtr;
return bytePtr[0]
| ((xxh_u64)bytePtr[1] << 8)
| ((xxh_u64)bytePtr[2] << 16)
| ((xxh_u64)bytePtr[3] << 24)
| ((xxh_u64)bytePtr[4] << 32)
| ((xxh_u64)bytePtr[5] << 40)
| ((xxh_u64)bytePtr[6] << 48)
| ((xxh_u64)bytePtr[7] << 56);
}