L4Re - L4 Runtime Environment
arith
1 // vi:set ft=cpp: -*- Mode: C++ -*-
2 /*
3  * (c) 2008-2009 Alexander Warg <warg@os.inf.tu-dresden.de>
4  * economic rights: Technische Universit├Ąt Dresden (Germany)
5  *
6  * This file is part of TUD:OS and distributed under the terms of the
7  * GNU General Public License 2.
8  * Please see the COPYING-GPL-2 file for details.
9  *
10  * As a special exception, you may use this file as part of a free software
11  * library without restriction. Specifically, if other files instantiate
12  * templates or use macros or inline functions from this file, or you compile
13  * this file and link it with other files to produce an executable, this
14  * file does not by itself cause the resulting executable to be covered by
15  * the GNU General Public License. This exception does not however
16  * invalidate any other reasons why the executable file might be covered by
17  * the GNU General Public License.
18  */
19 
20 #pragma once
21 
22 namespace cxx { namespace arith {
23 
24 template< unsigned long V >
25 struct Ld
26 {
27  enum { value = Ld<V / 2>::value + 1 };
28 };
29 
30 template<>
31 struct Ld<0>
32 {
33  enum { value = ~0UL };
34 };
35 
36 template<>
37 struct Ld<1>
38 {
39  enum { value = 0 };
40 };
41 
42 }}