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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 <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 */
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