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38 lines
947 B
C
38 lines
947 B
C
/* @(#)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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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: s_finite.c,v 1.8 1995/05/10 20:47:17 jtc Exp $";
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#endif
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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 <math.h>
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#include <math_private.h>
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#undef __finite
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int __finite(double x)
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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)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
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}
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hidden_def (__finite)
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weak_alias (__finite, finite)
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#ifdef NO_LONG_DOUBLE
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strong_alias (__finite, __finitel)
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weak_alias (__finite, finitel)
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#endif
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