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43 lines
1004 B
C
43 lines
1004 B
C
/* s_isnanl.c -- long double version of s_isnan.c.
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* Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
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*/
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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: $";
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#endif
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/*
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* isnanl(x) returns 1 is x is nan, 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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#ifdef __STDC__
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int __isnanl(long double x)
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#else
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int __isnanl(x)
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long double x;
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#endif
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{
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int64_t hx,lx;
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GET_LDOUBLE_WORDS64(hx,lx,x);
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hx &= 0x7fffffffffffffffLL;
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hx |= (u_int64_t)(lx|(-lx))>>63;
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hx = 0x7fff000000000000LL - hx;
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return (int)((u_int64_t)hx>>63);
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}
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weak_alias (__isnanl, isnanl)
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