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