36 lines
887 B
C
36 lines
887 B
C
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/* 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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* isnanq(x) returns 1 is x is nan, else 0;
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* no branching!
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*/
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#include "quadmath-imp.h"
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int isnanq(__float128 x)
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{
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int64_t hx,lx;
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GET_FLT128_WORDS64(hx,lx,x);
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hx &= 0x7fffffffffffffffLL;
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hx |= (uint64_t)(lx|(-lx))>>63;
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hx = 0x7fff000000000000LL - hx;
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return (int)((uint64_t)hx>>63);
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}
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