subtract
subtract(from, fromcap, totalfrom, crewfrom, pcfrom);
subtract(to, tocap, totalto, crewto, pcto);
subtract(from, fromcap, totalfrom, crewfrom, pcfrom);
subtract(to, tocap, totalto, crewto, pcto);
subtract(to, tocap, mento, crewto, pcto);
subtract(from, to, - mento, crewfrom, 0);
void subtract(struct ship *, struct ship *, int, int [3], int);
IA64_ATOMIC(1, uint8_t, subtract, 8, -)
IA64_ATOMIC(2, uint16_t, subtract, 16, -)
IA64_ATOMIC(4, uint32_t, subtract, 32, -)
IA64_ATOMIC(8, uint64_t, subtract, 64, -)