1 /* Boost interval/detail/sparc_rounding_control.hpp file 2 * 3 * Copyright 2000 Jens Maurer 4 * Copyright 2002 Hervé Brönnimann, Guillaume Melquiond, Sylvain Pion 5 * 6 * Distributed under the Boost Software License, Version 1.0. 7 * (See accompanying file LICENSE_1_0.txt or 8 * copy at http://www.boost.org/LICENSE_1_0.txt) 9 * 10 * The basic code in this file was kindly provided by Jeremy Siek. 11 */ 12 13 #ifndef BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP 14 #define BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP 15 16 #if !defined(sparc) && !defined(__sparc__) 17 # error This header is only intended for SPARC CPUs. 18 #endif 19 20 #ifdef __SUNPRO_CC 21 # include <ieeefp.h> 22 #endif 23 24 25 namespace boost { 26 namespace numeric { 27 namespace interval_lib { 28 namespace detail { 29 30 struct sparc_rounding_control 31 { 32 typedef unsigned int rounding_mode; 33 set_rounding_modeboost::numeric::interval_lib::detail::sparc_rounding_control34 static void set_rounding_mode(const rounding_mode& mode) 35 { 36 # if defined(__GNUC__) 37 __asm__ __volatile__("ld %0, %%fsr" : : "m"(mode)); 38 # elif defined (__SUNPRO_CC) 39 fpsetround(fp_rnd(mode)); 40 # elif defined(__KCC) 41 asm("sethi %hi(mode), %o1"); 42 asm("ld [%o1+%lo(mode)], %fsr"); 43 # else 44 # error Unsupported compiler for Sparc rounding control. 45 # endif 46 } 47 get_rounding_modeboost::numeric::interval_lib::detail::sparc_rounding_control48 static void get_rounding_mode(rounding_mode& mode) 49 { 50 # if defined(__GNUC__) 51 __asm__ __volatile__("st %%fsr, %0" : "=m"(mode)); 52 # elif defined (__SUNPRO_CC) 53 mode = fpgetround(); 54 # elif defined(__KCC) 55 # error KCC on Sun SPARC get_round_mode: please fix me 56 asm("st %fsr, [mode]"); 57 # else 58 # error Unsupported compiler for Sparc rounding control. 59 # endif 60 } 61 62 #if defined(__SUNPRO_CC) downwardboost::numeric::interval_lib::detail::sparc_rounding_control63 static void downward() { set_rounding_mode(FP_RM); } upwardboost::numeric::interval_lib::detail::sparc_rounding_control64 static void upward() { set_rounding_mode(FP_RP); } to_nearestboost::numeric::interval_lib::detail::sparc_rounding_control65 static void to_nearest() { set_rounding_mode(FP_RN); } toward_zeroboost::numeric::interval_lib::detail::sparc_rounding_control66 static void toward_zero() { set_rounding_mode(FP_RZ); } 67 #else downwardboost::numeric::interval_lib::detail::sparc_rounding_control68 static void downward() { set_rounding_mode(0xc0000000); } upwardboost::numeric::interval_lib::detail::sparc_rounding_control69 static void upward() { set_rounding_mode(0x80000000); } to_nearestboost::numeric::interval_lib::detail::sparc_rounding_control70 static void to_nearest() { set_rounding_mode(0x00000000); } toward_zeroboost::numeric::interval_lib::detail::sparc_rounding_control71 static void toward_zero() { set_rounding_mode(0x40000000); } 72 #endif 73 }; 74 75 } // namespace detail 76 77 extern "C" { 78 float rintf(float); 79 double rint(double); 80 } 81 82 template<> 83 struct rounding_control<float>: 84 detail::sparc_rounding_control 85 { force_roundingboost::numeric::interval_lib::rounding_control86 static const float& force_rounding(const float& x) { return x; } to_intboost::numeric::interval_lib::rounding_control87 static float to_int(const float& x) { return rintf(x); } 88 }; 89 90 template<> 91 struct rounding_control<double>: 92 detail::sparc_rounding_control 93 { force_roundingboost::numeric::interval_lib::rounding_control94 static const double& force_rounding(const double& x) { return x; } to_intboost::numeric::interval_lib::rounding_control95 static double to_int(const double& x) { return rint(x); } 96 }; 97 98 template<> 99 struct rounding_control<long double>: 100 detail::sparc_rounding_control 101 { force_roundingboost::numeric::interval_lib::rounding_control102 static const long double& force_rounding(const long double& x) { return x; } to_intboost::numeric::interval_lib::rounding_control103 static long double to_int(const long double& x) { return rint(x); } 104 }; 105 106 } // namespace interval_lib 107 } // namespace numeric 108 } // namespace boost 109 110 #undef BOOST_NUMERIC_INTERVAL_NO_HARDWARE 111 112 #endif /* BOOST_NUMERIC_INTERVAL_DETAIL_SPARC_ROUNDING_CONTROL_HPP */ 113