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36 lines
749 B
C
36 lines
749 B
C
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/* @(#)s_finite.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/*
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* finite(x) returns 1 is x is finite, else 0;
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* no branching!
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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 finite(double x)
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#else
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int finite(x)
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double x;
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#endif
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{
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__int32_t hx;
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GET_HIGH_WORD(hx,x);
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return (int)((__uint32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
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}
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#endif /* _DOUBLE_IS_32BITS */
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