- printf("%s acosh(%a) want %a got %a ulperr %.3f = %a + %a\n",
- rstr(p->r), p->x, p->y, y, d, d-p->dy, p->dy);
+ // only report at most one <2ulp error
+ if (fabsf(d) < 2 && err) continue;
+ printf("%s:%d: %s acosh(%a) want %a got %a ulperr %.3f = %a + %a\n",
+ p->file, p->line, rstr(p->r), p->x, p->y, y, d, d-p->dy, p->dy);