printf("%s:%d: %s ynf(%a, %lld) want %a got %a, ulperr %.3f = %a + %a\n",
p->file, p->line, rstr(p->r), p->x, p->i, p->y, y, d, d-p->dy, p->dy);
err++;
printf("%s:%d: %s ynf(%a, %lld) want %a got %a, ulperr %.3f = %a + %a\n",
p->file, p->line, rstr(p->r), p->x, p->i, p->y, y, d, d-p->dy, p->dy);
err++;