ROTL64_TO          67 siphash.c      #define ROTL64_TO(v, s) ((v) = ROTL64((v), (s)))
ROTL64_TO          91 siphash.c      #define ROTL64_TO(v, s) ((s) > 32 ? rotl64_swap(rotl64_to(&(v), (s) - 32)) : \