You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
83 lines
2.1 KiB
83 lines
2.1 KiB
/* 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 */ |
|
|
|
|