blob: 5d537607abb5476eaa333a151449a602db927c68 (
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
|
/* @(#)z_isinff.c 1.0 98/08/13 */
/******************************************************************
* isinff
*
* Input:
* x - pointer to a floating point value
*
* Output:
* An integer that indicates if the number is infinite.
*
* Description:
* This routine returns an integer that indicates if the number
* passed in is infinite (1) or is finite (0).
*
*****************************************************************/
#include "fdlibm.h"
#include "zmath.h"
int isinff (float x)
{
__uint32_t wx;
int exp;
GET_FLOAT_WORD (wx, x);
exp = (wx & 0x7f800000) >> 23;
if ((exp == 0x7f8) && !(wx & 0xf0000))
return (1);
else
return (0);
}
|