Someone

static inline void umull(unsigned int *lo, unsigned int *hi, unsigned int r1, unsigned int r2) {  unsigned long long tmp = (unsigned long long)r1 * (unsigned long long)r2;  *lo = tmp & 0xffffffff;  *hi = tmp >> 32;  flag_n = (*hi & 0x80000000);  flag_z = (*hi == 0 && *lo == 0);}