copysignf
float copysignf(float, float) __pure2;
extern float copysignf(float, float);
return (FLT_MAX * copysignf(FLT_MAX, x));
return (FLT_MIN * copysignf(FLT_MIN, x));
return (FLT_MAX * copysignf(FLT_MAX, x));
return (FLT_MIN * copysignf(FLT_MIN, x));