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- #ifndef _MATH_H
- # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
- #endif
- #ifdef __cplusplus
- # define __MATH_INLINE __inline
- #else
- # define __MATH_INLINE __extern_inline
- #endif
- #if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2
- __MATH_INLINE int
- __NTH (__signbitf (float __x))
- {
- __extension__ union { float __f; int __i; } __u = { __f: __x };
- return __u.__i < 0;
- }
- __MATH_INLINE int
- __NTH (__signbit (double __x))
- {
- __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
- return __u.__i[1] < 0;
- }
- __MATH_INLINE int
- __NTH (__signbitl (long double __x))
- {
- __extension__ union { long double __l; int __i[3]; } __u = { __l: __x };
- return (__u.__i[2] & 0x8000) != 0;
- }
- #endif
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