blob: 6d435f00b265c3695cfc5b8b52580c0fc22d6b35 (
plain)
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
|
/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: s_isinf.c,v 1.3 1995/05/11 23:20:14 jtc Exp $";
#endif
/*
* isinf(x) returns 1 is x is inf, else 0;
* no branching!
*/
#include "math.h"
#include "math_private.h"
#ifdef __STDC__
int __isinf(double x)
#else
int __isinf(x)
double x;
#endif
{
int32_t hx,lx;
EXTRACT_WORDS(hx,lx,x);
hx &= 0x7fffffff;
hx ^= 0x7ff00000;
hx |= lx;
return (hx == 0);
}
weak_alias (__isinf, isinf)
#ifdef NO_LONG_DOUBLE
weak_alias (__isinf, isinfl)
#endif
|
