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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/* Boost interval/detail/bcc_rounding_control.hpp file
*
* Copyright 2000 Jens Maurer
* Copyright 2002 Hervé Brönnimann, Guillaume Melquiond, Sylvain Pion
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or
* copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef GECODE_BOOST_NUMERIC_INTERVAL_DETAIL_BCC_ROUNDING_CONTROL_HPP
#define GECODE_BOOST_NUMERIC_INTERVAL_DETAIL_BCC_ROUNDING_CONTROL_HPP
#ifndef __BORLANDC__
# error This header is only intended for Borland C++.
#endif
#ifndef _M_IX86
# error This header only works on x86 CPUs.
#endif
#include <float.h> // Borland C++ rounding control
namespace gecode_boost {
namespace numeric {
namespace interval_lib {
namespace detail {
#ifndef GECODE_BOOST_NUMERIC_INTERVAL_KEEP_EXCEPTIONS_FOR_BCC
extern "C" { unsigned int _RTLENTRY _fm_init(void); }
struct borland_workaround {
borland_workaround() { _fm_init(); }
};
static borland_workaround borland_workaround_exec;
#endif // GECODE_BOOST_NUMERIC_INTERVAL_KEEP_EXCEPTIONS_FOR_BCC
__inline double rint(double)
{ __emit__(0xD9); __emit__(0xFC); /* asm FRNDINT */ }
struct x86_rounding
{
typedef unsigned int rounding_mode;
static void get_rounding_mode(rounding_mode& mode)
{ mode = _control87(0, 0); }
static void set_rounding_mode(const rounding_mode mode)
{ _control87(mode, 0xffff); }
static double to_int(const double& x) { return rint(x); }
};
} // namespace detail
} // namespace interval_lib
} // namespace numeric
} // namespace gecode_boost
#endif /* GECODE_BOOST_NUMERIC_INTERVAL_DETAIL_BCC_ROUNDING_CONTROL_HPP */
|
