TERA
} else if (v < TERA * 10) {
pv = (double)v / TERA;
} else if (v < TERA * 100) {
pv = (double)v / TERA;
} else if (v < TERA * 1000) {
pv = (double)v / TERA;
#define PETA ((uint64_t)(TERA * 1000))