Chris@16: /* Boost interval/detail/ia64_rounding_control.hpp file
Chris@16:  *
Chris@16:  * Copyright 2006-2007 Boris Gubenko
Chris@16:  *
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  * (See accompanying file LICENSE_1_0.txt or
Chris@16:  * copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_NUMERIC_INTERVAL_DETAIL_IA64_ROUNDING_CONTROL_HPP
Chris@16: #define BOOST_NUMERIC_INTERVAL_DETAIL_IA64_ROUNDING_CONTROL_HPP
Chris@16: 
Chris@16: #if !defined(ia64) && !defined(__ia64) && !defined(__ia64__)
Chris@16: #error This header only works on ia64 CPUs.
Chris@16: #endif
Chris@16: 
Chris@16: #if defined(__hpux)
Chris@16: 
Chris@16: #   include <fenv.h>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace numeric {
Chris@16: namespace interval_lib {
Chris@16: namespace detail {
Chris@16: 
Chris@16: 
Chris@16:     struct ia64_rounding_control
Chris@16:     {
Chris@16:     typedef unsigned int rounding_mode;
Chris@16: 
Chris@16:     static void set_rounding_mode(const rounding_mode& mode)  { 
Chris@16: fesetround(mode); }
Chris@16:     static void get_rounding_mode(rounding_mode& mode)  { mode = fegetround(); }
Chris@16: 
Chris@16:     static void downward()    { set_rounding_mode(FE_DOWNWARD); }
Chris@16:     static void upward()      { set_rounding_mode(FE_UPWARD); }
Chris@16:     static void to_nearest()  { set_rounding_mode(FE_TONEAREST); }
Chris@16:     static void toward_zero() { set_rounding_mode(FE_TOWARDZERO); }
Chris@16:     };
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: extern "C" {
Chris@16:   float rintf(float);
Chris@16:   double rint(double);
Chris@16:   long double rintl(long double);
Chris@16: }
Chris@16: 
Chris@16: template<>
Chris@16: struct rounding_control<float>:
Chris@16:   detail::ia64_rounding_control
Chris@16: {
Chris@16:   static float force_rounding(const float r)
Chris@16:   { volatile float _r = r; return _r; }
Chris@16:   static float to_int(const float& x) { return rintf(x); }
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct rounding_control<double>:
Chris@16:   detail::ia64_rounding_control
Chris@16: {
Chris@16:   static const double & force_rounding(const double& r) { return r; }
Chris@16:   static double to_int(const double& r) { return rint(r); }
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct rounding_control<long double>:
Chris@16:   detail::ia64_rounding_control
Chris@16: {
Chris@16:   static const long double & force_rounding(const long double& r) { return r; }
Chris@16:   static long double to_int(const long double& r) { return rintl(r); }
Chris@16: };
Chris@16: 
Chris@16: } // namespace interval_lib
Chris@16: } // namespace numeric
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #undef BOOST_NUMERIC_INTERVAL_NO_HARDWARE
Chris@16: 
Chris@16: #endif /* __hpux */
Chris@16: 
Chris@16: #endif /* BOOST_NUMERIC_INTERVAL_DETAIL_IA64_ROUNDING_CONTROL_HPP */
Chris@16: