/* 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 */ | |