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
|
/*
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.
*/
/*
* isinff(x) returns 1 if x is +-infinity, else 0;
*
* isinf is a <math.h> macro in the C99 standard. It was previously
* implemented as isinf and isinff functions by newlib and are still declared
* as such in <math.h>. Newlib supplies it here as a function if the user
* chooses to use it instead of the C99 macro.
*/
#include "fdlibm.h"
#include <ieeefp.h>
#undef isinff
int
isinff (float x)
{
__int32_t ix;
GET_FLOAT_WORD(ix,x);
ix &= 0x7fffffff;
return FLT_UWORD_IS_INFINITE(ix);
}
#undef isinf
_MATH_ALIAS_i_f(isinf)
|
