8 #ifndef BOTAN_MPI_TYPES_H__     9 #define BOTAN_MPI_TYPES_H__    11 #include <botan/types.h>    15 #if (BOTAN_MP_WORD_BITS == 8)    17 #elif (BOTAN_MP_WORD_BITS == 16)    19 #elif (BOTAN_MP_WORD_BITS == 32)    21 #elif (BOTAN_MP_WORD_BITS == 64)    24   #error BOTAN_MP_WORD_BITS must be 8, 16, 32, or 64 
unsigned long long u64bit
const word MP_WORD_TOP_BIT