1/* s_isnanf.c -- float version of s_isnan.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993, 2011 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#if defined(LIBM_SCCS) && !defined(lint)
17static char rcsid[] = "$NetBSD: s_isnanf.c,v 1.4 1995/05/10 20:47:38 jtc Exp $";
18#endif
19
20/*
21 * isnanf(x) returns 1 is x is nan, else 0;
22 * no branching!
23 */
24
25#include <math.h>
26#include <math_private.h>
27
28#undef __isnanf
29int __isnanf(float x)
30{
31 int32_t ix;
32 GET_FLOAT_WORD(ix,x);
33 ix &= 0x7fffffff;
34 ix = 0x7f800000 - ix;
35 return (int)(((uint32_t)(ix))>>31);
36}
37hidden_def (__isnanf)
38weak_alias (__isnanf, isnanf)
39