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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libm/] [mathfp/] [s_isinf.c] - Rev 57
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/* @(#)z_isinf.c 1.0 98/08/13 */ /****************************************************************** * isinf * * Input: * x - pointer to a floating point value * * Output: * An integer that indicates if the number is infinite. * * Description: * This routine returns an integer that indicates if the number * passed in is infinite (1) or is finite (0). * *****************************************************************/ #include "fdlibm.h" #include "zmath.h" #ifndef _DOUBLE_IS_32BITS int isinf (double x) { __uint32_t lx, hx; int exp; EXTRACT_WORDS (hx, lx, x); exp = (hx & 0x7ff00000) >> 20; if ((exp == 0x7ff) && ((hx & 0xf0000 || lx) == 0)) return (1); else return (0); } #endif /* _DOUBLE_IS_32BITS */
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