calc_memaddr
extern int calc_memaddr(struct regs *, caddr_t *);
if (calc_memaddr(rp, &badaddr) == SIMU_UNALIGN)
if (calc_memaddr(rp, &addr) == SIMU_SUCCESS) {
if (calc_memaddr(rp, &addr) != SIMU_SUCCESS)
if (calc_memaddr(rp, &addr) != SIMU_SUCCESS)
(calc_memaddr(rp, &badaddr) == SIMU_SUCCESS))
if (calc_memaddr(rp, &badaddr) == SIMU_UNALIGN)