5980be9b3c
This work is based in part on code from NetBSD libm, libc and kernel. The library is partly public domain and partly BSD-style licensed.
33 lines
792 B
C
33 lines
792 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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#include <sys/cdefs.h>
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#if defined(LIBM_SCCS) && !defined(lint)
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__RCSID("$NetBSD: s_finite.c,v 1.11 2002/05/26 22:01:55 wiz 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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int
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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)((uint32_t)((hx&0x7fffffff)-0x7ff00000)>>31);
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}
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