1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
/* 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 <math.h>.
*/
#include "fdlibm.h"
#include <ieeefp.h>
#undef isnanf
int
isnanf (float x)
{
__int32_t ix;
GET_FLOAT_WORD(ix,x);
ix &= 0x7fffffff;
return FLT_UWORD_IS_NAN(ix);
}
#undef isnan
_MATH_ALIAS_i_f(isnan)
|
