POK
isinff.c
1 /*
2  * POK header
3  *
4  * The following file is a part of the POK project. Any modification should
5  * made according to the POK licence. You CANNOT use this file or a part of
6  * this file is this part of a file for your own project
7  *
8  * For more information on the POK licence, please see our LICENCE FILE
9  *
10  * Please follow the coding guidelines described in doc/CODING_GUIDELINES
11  *
12  * Copyright (c) 2007-2009 POK team
13  *
14  * Created by julien on Fri Jan 30 14:41:34 2009
15  */
16 
17 /*
18  * Written by J.T. Conklin <jtc@NetBSD.org>.
19  * Public domain.
20  */
21 
22 
23 /*
24  * isinff(x) returns 1 is x is inf, else 0;
25  * no branching!
26  */
27 
28 #ifdef POK_NEEDS_LIBMATH
29 
30 #include <libm.h>
31 #include "math_private.h"
32 
33 int
34 isinff(float x)
35 {
36  int32_t ix;
37  GET_FLOAT_WORD(ix,x);
38  ix &= 0x7fffffff;
39  ix ^= 0x7f800000;
40  return (ix == 0);
41 }
42 
43 #endif