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/* sf_c_isnan.c -- float version of s_c_isnan.c.

 */

/*

 * ====================================================

 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

 *

 * Developed at SunPro, a Sun Microsystems, Inc. business.

 * Permission to use, copy, modify, and distribute this

 * software is freely granted, provided that this notice

 * is preserved.

 * ====================================================

 */

/*

 * isnanf(x) returns 1 is x is nan, else 0;

 *

 * isnanf is an extension declared in <ieeefp.h> and <math.h>.

 */

#include "fdlibm.h"

int

_DEFUN (isnanf, (x),

        float x)

{

        __int32_t ix;

        GET_FLOAT_WORD(ix,x);

        ix &= 0x7fffffff;

        return FLT_UWORD_IS_NAN(ix);

}

#ifdef _DOUBLE_IS_32BITS

#undef isnan

int

_DEFUN (isnan, (x),

        double x)

{

        return isnanf((float) x);

}

#endif /* defined(_DOUBLE_IS_32BITS) */