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