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39 lines
967 B
C
39 lines
967 B
C
/* s_isnanf.c -- float version of s_isnan.c.
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* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993, 2011 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_isnanf.c,v 1.4 1995/05/10 20:47:38 jtc Exp $";
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#endif
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/*
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* isnanf(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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#undef __isnanf
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int __isnanf(float x)
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{
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int32_t ix;
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GET_FLOAT_WORD(ix,x);
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ix &= 0x7fffffff;
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ix = 0x7f800000 - ix;
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return (int)(((u_int32_t)(ix))>>31);
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}
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hidden_def (__isnanf)
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weak_alias (__isnanf, isnanf)
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