f_pd0
f->f_fa, f->f_pd0);
fastcopy16((void *)fa, (void *)&f->f_pd0);
f->f_fa, f->f_fa & ~0xF, f->f_pd0, f->f_pd1,
fastcopy16((void *)(f->f_fa & ~0xF), (void *)&f->f_pd0);
err = suline((void *)(f->f_fa & ~0xF), (void *)&f->f_pd0);
f->f_fa & ~0xF, f->f_pd0);