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      1  1.1     jtc /* s_isnanf.c -- float version of s_isnan.c.
      2  1.1     jtc  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian (at) cygnus.com.
      3  1.1     jtc  */
      4  1.1     jtc 
      5  1.1     jtc /*
      6  1.1     jtc  * ====================================================
      7  1.1     jtc  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
      8  1.1     jtc  *
      9  1.1     jtc  * Developed at SunPro, a Sun Microsystems, Inc. business.
     10  1.1     jtc  * Permission to use, copy, modify, and distribute this
     11  1.6  simonb  * software is freely granted, provided that this notice
     12  1.1     jtc  * is preserved.
     13  1.1     jtc  * ====================================================
     14  1.1     jtc  */
     15  1.1     jtc 
     16  1.5   lukem #include <sys/cdefs.h>
     17  1.3     jtc #if defined(LIBM_SCCS) && !defined(lint)
     18  1.7     wiz __RCSID("$NetBSD: s_isnanf.c,v 1.7 2002/05/26 22:01:56 wiz Exp $");
     19  1.1     jtc #endif
     20  1.1     jtc 
     21  1.1     jtc /*
     22  1.1     jtc  * isnanf(x) returns 1 is x is nan, else 0;
     23  1.1     jtc  * no branching!
     24  1.1     jtc  */
     25  1.1     jtc 
     26  1.1     jtc #include "math.h"
     27  1.1     jtc #include "math_private.h"
     28  1.1     jtc 
     29  1.7     wiz int
     30  1.7     wiz isnanf(float x)
     31  1.1     jtc {
     32  1.2     jtc 	int32_t ix;
     33  1.1     jtc 	GET_FLOAT_WORD(ix,x);
     34  1.1     jtc 	ix &= 0x7fffffff;
     35  1.1     jtc 	ix = 0x7f800000 - ix;
     36  1.2     jtc 	return (int)(((u_int32_t)(ix))>>31);
     37  1.1     jtc }
     38