6 int double_format(char *buf
, char spec
, int precision
, double val
);
7 double double_signum(double val
);
8 float float_signum(float val
);
9 int double_classify(double val
);
10 int float_classify(float val
);
11 int double_compare(double a
, double b
);
12 int float_compare(float a
, float b
);
14 int set_roundmode(int mode
);
15 int get_roundmode(void);
16 int fenv_restore(fenv_t
*env
, unsigned *excepts
);
17 int fenv_raise_excepts(unsigned excepts
);
