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27 lines
428 B
C
27 lines
428 B
C
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/*
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* isinf(x) returns 1 if x is infinity, else 0;
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* no branching!
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* Added by Cygnus Support.
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*/
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#include "fdlibm.h"
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#ifndef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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int isinf(double x)
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#else
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int isinf(x)
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double x;
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#endif
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{
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__int32_t hx,lx;
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EXTRACT_WORDS(hx,lx,x);
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hx &= 0x7fffffff;
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hx |= (__uint32_t)(lx|(-lx))>>31;
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hx = 0x7ff00000 - hx;
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return 1 - (int)((__uint32_t)(hx|(-hx))>>31);
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}
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#endif /* _DOUBLE_IS_32BITS */
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