| /* Boost interval/detail/ia64_rounding_control.hpp file |
| * |
| * Copyright 2006-2007 Boris Gubenko |
| * |
| * 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_IA64_ROUNDING_CONTROL_HPP |
| #define BOOST_NUMERIC_INTERVAL_DETAIL_IA64_ROUNDING_CONTROL_HPP |
| |
| #if !defined(ia64) && !defined(__ia64) && !defined(__ia64__) |
| #error This header only works on ia64 CPUs. |
| #endif |
| |
| #if defined(__hpux) |
| |
| # include <fenv.h> |
| |
| namespace boost { |
| namespace numeric { |
| namespace interval_lib { |
| namespace detail { |
| |
| |
| struct ia64_rounding_control |
| { |
| typedef unsigned int rounding_mode; |
| |
| static void set_rounding_mode(const rounding_mode& mode) { |
| fesetround(mode); } |
| static void get_rounding_mode(rounding_mode& mode) { mode = fegetround(); } |
| |
| static void downward() { set_rounding_mode(FE_DOWNWARD); } |
| static void upward() { set_rounding_mode(FE_UPWARD); } |
| static void to_nearest() { set_rounding_mode(FE_TONEAREST); } |
| static void toward_zero() { set_rounding_mode(FE_TOWARDZERO); } |
| }; |
| |
| } // namespace detail |
| |
| extern "C" { |
| float rintf(float); |
| double rint(double); |
| long double rintl(long double); |
| } |
| |
| template<> |
| struct rounding_control<float>: |
| detail::ia64_rounding_control |
| { |
| static float force_rounding(const float r) |
| { volatile float _r = r; return _r; } |
| static float to_int(const float& x) { return rintf(x); } |
| }; |
| |
| template<> |
| struct rounding_control<double>: |
| detail::ia64_rounding_control |
| { |
| static const double & force_rounding(const double& r) { return r; } |
| static double to_int(const double& r) { return rint(r); } |
| }; |
| |
| template<> |
| struct rounding_control<long double>: |
| detail::ia64_rounding_control |
| { |
| static const long double & force_rounding(const long double& r) { return r; } |
| static long double to_int(const long double& r) { return rintl(r); } |
| }; |
| |
| } // namespace interval_lib |
| } // namespace numeric |
| } // namespace boost |
| |
| #undef BOOST_NUMERIC_INTERVAL_NO_HARDWARE |
| |
| #endif /* __hpux */ |
| |
| #endif /* BOOST_NUMERIC_INTERVAL_DETAIL_IA64_ROUNDING_CONTROL_HPP */ |
| |