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glibc  2.9
s_isinf.c File Reference
#include "math.h"
#include "math_private.h"
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int __isinf (double x)

Function Documentation

int __isinf ( double  x)

Definition at line 20 of file s_isinf.c.

       int32_t hx,lx;
       lx |= (hx & 0x7fffffff) ^ 0x7ff00000;
       lx |= -lx;
       return ~(lx >> 31) & (hx >> 30);

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