Chris@16: /* Boost interval/detail/sparc_rounding_control.hpp file
Chris@16:  *
Chris@16:  * Copyright 2000 Jens Maurer
Chris@16:  * Copyright 2002 Hervé Brönnimann, Guillaume Melquiond, Sylvain Pion
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:  * The basic code in this file was kindly provided by Jeremy Siek.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP
Chris@16: #define BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP
Chris@16: 
Chris@16: #if !defined(sparc) && !defined(__sparc__)
Chris@16: #  error This header is only intended for SPARC CPUs.
Chris@16: #endif
Chris@16: 
Chris@16: #ifdef __SUNPRO_CC
Chris@16: #  include <ieeefp.h>
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace numeric {
Chris@16: namespace interval_lib {
Chris@16: namespace detail {
Chris@16: 
Chris@16: struct sparc_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:   {
Chris@16: #   if defined(__GNUC__)
Chris@16:     __asm__ __volatile__("ld %0, %%fsr" : : "m"(mode));
Chris@16: #   elif defined (__SUNPRO_CC)
Chris@16:     fpsetround(fp_rnd(mode));
Chris@16: #   elif defined(__KCC)
Chris@16:     asm("sethi %hi(mode), %o1");
Chris@16:     asm("ld [%o1+%lo(mode)], %fsr");
Chris@16: #   else
Chris@16: #     error Unsupported compiler for Sparc rounding control.
Chris@16: #   endif
Chris@16:   }
Chris@16: 
Chris@16:   static void get_rounding_mode(rounding_mode& mode)
Chris@16:   {
Chris@16: #   if defined(__GNUC__)
Chris@16:     __asm__ __volatile__("st %%fsr, %0" : "=m"(mode));
Chris@16: #   elif defined (__SUNPRO_CC)
Chris@16:     mode = fpgetround();
Chris@16: #   elif defined(__KCC)
Chris@16: #     error KCC on Sun SPARC get_round_mode: please fix me
Chris@16:     asm("st %fsr, [mode]");
Chris@16: #   else
Chris@16: #     error Unsupported compiler for Sparc rounding control.
Chris@16: #   endif
Chris@16:   }
Chris@16: 
Chris@16: #if defined(__SUNPRO_CC)
Chris@16:   static void downward()    { set_rounding_mode(FP_RM); }
Chris@16:   static void upward()      { set_rounding_mode(FP_RP); }
Chris@16:   static void to_nearest()  { set_rounding_mode(FP_RN); }
Chris@16:   static void toward_zero() { set_rounding_mode(FP_RZ); }
Chris@16: #else
Chris@16:   static void downward()    { set_rounding_mode(0xc0000000); }
Chris@16:   static void upward()      { set_rounding_mode(0x80000000); }
Chris@16:   static void to_nearest()  { set_rounding_mode(0x00000000); }
Chris@16:   static void toward_zero() { set_rounding_mode(0x40000000); }
Chris@16: #endif
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: }
Chris@16: 
Chris@16: template<>
Chris@16: struct rounding_control<float>:
Chris@16:   detail::sparc_rounding_control
Chris@16: {
Chris@16:   static const float& force_rounding(const float& x) { return x; }
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::sparc_rounding_control
Chris@16: {
Chris@16:   static const double& force_rounding(const double& x) { return x; }
Chris@16:   static double to_int(const double& x) { return rint(x); }
Chris@16: };
Chris@16: 
Chris@16: template<>
Chris@16: struct rounding_control<long double>:
Chris@16:   detail::sparc_rounding_control
Chris@16: {
Chris@16:   static const long double& force_rounding(const long double& x) { return x; }
Chris@16:   static long double to_int(const long double& x) { return rint(x); }
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 /* BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP */