div64_s64_precise
temp_a = div64_s64_precise((int64_t) delta_temp * (1LL << 13) * mult,
temp_b = div64_s64_precise(tmp, (int64_t)delta_sens);
temp_a = div64_s64_precise((int64_t)temp_a * sensor->fuse_corr_alpha,
temp_b = div64_s64_precise((int64_t)temp_b * sensor->fuse_corr_alpha +