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ia64_rounding_control.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\numeric\interval\detail\ia64_rounding_control.hpp
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/* 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
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
: 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
: 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
: 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 */
ia64_rounding_control.hpp
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