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3.0 kB · 94 lines
C++
at develop
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- *//* * Main authors: * Christian Schulte <schulte@gecode.org> * * Copyright: * Christian Schulte, 2013 * * This file is part of Gecode, the generic constraint * development environment: * http://www.gecode.org * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */
namespace Gecode { namespace Int {
template<class IntType> forceinline IntType ceil_div_pp(IntType x, IntType y) { assert((x >= 0) && (y >= 0)); /* * This is smarter than it looks: for many cpus, % and / are * implemented by the same instruction and an optimizing compiler * will generate the instruction only once. */ return ((x % y) == 0) ? x/y : (x/y + 1); } template<class IntType> forceinline IntType floor_div_pp(IntType x, IntType y) { assert((x >= 0) && (y >= 0)); return x / y; }
template<class IntType> forceinline IntType ceil_div_px(IntType x, IntType y) { assert(x >= 0); return (y >= 0) ? ceil_div_pp(x,y) : -floor_div_pp(x,-y); } template<class IntType> forceinline IntType floor_div_px(IntType x, IntType y) { assert(x >= 0); return (y >= 0) ? floor_div_pp(x,y) : -ceil_div_pp(x,-y); }
template<class IntType> forceinline IntType ceil_div_xp(IntType x, IntType y) { assert(y >= 0); return (x >= 0) ? ceil_div_pp(x,y) : -floor_div_pp(-x,y); } template<class IntType> forceinline IntType floor_div_xp(IntType x, IntType y) { assert(y >= 0); return (x >= 0) ? floor_div_pp(x,y) : -ceil_div_pp(-x,y); }
template<class IntType> forceinline IntType ceil_div_xx(IntType x, IntType y) { return (x >= 0) ? ceil_div_px(x,y) : -floor_div_px(-x,y); } template<class IntType> forceinline IntType floor_div_xx(IntType x, IntType y) { return (x >= 0) ? floor_div_px(x,y) : -ceil_div_px(-x,y); }
}}
// STATISTICS: int-prop