BN_UMULT_LOHI
#define BN_UMULT_LOHI(low, high, a, b) ({ \
#define BN_UMULT_LOHI(low, high, a, b) \
#define BN_UMULT_LOHI(low, high, a, b) ((low) = _umul128((a), (b), &(high)))
#define BN_UMULT_LOHI(low, high, a, b) \