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#include <math.h>
#define signbit(__x) \
(sizeof(__x) == sizeof(long double) ? \
((((union { \
long double __f; \
char __c[sizeof(__x)]; \
}){.__f = (__x)}).__c[sizeof(__x)-1] & 0x80) == 0x80 ? 1 : 0) : \
sizeof(__x) == sizeof(double) ? \
((((union { \
double __f; \
char __c[sizeof(__x)]; \
}){.__f = (__x)}).__c[sizeof(__x)-1] & 0x80) == 0x80 ? 1 : 0) : \
(((union { \
float __f; \
char __c[sizeof(__x)]; \
}){.__f = (__x)}).__c[sizeof(__x)-1] & 0x80) == 0x80 ? 1 : 0)
/*
STDC(199901)
LINK(m)
*/
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