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rounding.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2012
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 namespace Gecode { namespace Float {
00035 
00036   forceinline
00037   Rounding::Rounding(void) {
00038     RoundingBase::init();
00039   }
00040   forceinline
00041   Rounding::~Rounding(void) {}
00042 
00043   forceinline FloatNum
00044   Rounding::median(FloatNum x, FloatNum y) {
00045     return RoundingBase::median(x,y);
00046   }
00047 
00048 #define GECODE_ROUND_OP(name) \
00049   forceinline FloatNum                            \
00050   Rounding::name##_down(FloatNum x, FloatNum y) { \
00051     return RoundingBase::name##_down(x,y);        \
00052   }                                               \
00053   forceinline FloatNum                            \
00054   Rounding::name##_up(FloatNum x, FloatNum y) {   \
00055     return RoundingBase::name##_up(x,y);          \
00056   }
00057 
00058   GECODE_ROUND_OP(add)
00059   GECODE_ROUND_OP(sub)
00060   GECODE_ROUND_OP(mul)
00061   GECODE_ROUND_OP(div)
00062 
00063 #undef GECODE_ROUND_OP
00064 
00065 #define GECODE_ROUND_FUN(name) \
00066   forceinline FloatNum                   \
00067   Rounding::name##_down(FloatNum x) {    \
00068     return RoundingBase::name##_down(x); \
00069   }                                      \
00070   forceinline FloatNum                   \
00071   Rounding::name##_up(FloatNum x) {      \
00072     return RoundingBase::name##_up(x);   \
00073   }
00074 
00075   GECODE_ROUND_FUN(sqrt)
00076 
00077 #if defined(_M_X64) || defined(_M_IA64)
00078 
00079   // Workaround as MSVC on x64 does not have a rint function
00080   forceinline FloatNum
00081   Rounding::int_down(FloatNum x) {
00082     return floor(x);
00083   }
00084   forceinline FloatNum
00085   Rounding::int_up(FloatNum x) {
00086     return ceil(x);
00087   }
00088 
00089 #else
00090 
00091   GECODE_ROUND_FUN(int)
00092 
00093 #endif
00094 
00095 #undef GECODE_ROUND_FUN
00096 
00097 }}
00098 
00099 // STATISTICS: float-var
00100