| /* 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 BOOST_NUMERIC_INTERVAL_DETAIL_BCC_ROUNDING_CONTROL_HPP |
| #define 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 boost { |
| namespace numeric { |
| namespace interval_lib { |
| namespace detail { |
| |
| #ifndef 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 // 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 boost |
| |
| #endif /* BOOST_NUMERIC_INTERVAL_DETAIL_BCC_ROUNDING_CONTROL_HPP */ |