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C++
at develop
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- *//* * Main authors: * Vincent Barichard <Vincent.Barichard@univ-angers.fr> * * Copyright: * Vincent Barichard, 2012 * * 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 Float { namespace Arithmetic {
/* * Bounds consistent square operator * */
template<class A, class B> forceinline Pow<A,B>::Pow(Home home, A x0, B x1, int n) : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1), m_n(n) {}
template<class A, class B> ExecStatus Pow<A,B>::post(Home home, A x0, B x1, int n) { if (n == 0) { if ((x0.min() == 0.0) && (x0.max() == 0.0)) return ES_FAILED; GECODE_ME_CHECK(x1.eq(home,1.0)); return ES_OK; }
GECODE_ME_CHECK(x1.eq(home,pow(x0.domain(),n))); if ((x1.min() == 0.0) && (x1.max() == 0.0)) { GECODE_ME_CHECK(x1.eq(home,0.0)); return ES_OK; }
if ((n % 2) == 0) { if (x0.min() >= 0) GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),n))); else if (x0.max() <= 0) GECODE_ME_CHECK(x0.eq(home,-nroot(x1.domain(),n))); else GECODE_ME_CHECK(x0.eq(home, hull( nroot(x1.domain(),n), -nroot(x1.domain(),n) ) )); } else { GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),n))); }
if (!x0.assigned()) (void) new (home) Pow<A,B>(home,x0,x1,n); return ES_OK; }
template<class A, class B> forceinline Pow<A,B>::Pow(Space& home, Pow<A,B>& p) : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,p), m_n(p.m_n) {}
template<class A, class B> Actor* Pow<A,B>::copy(Space& home) { return new (home) Pow<A,B>(home,*this); }
template<class A, class B> ExecStatus Pow<A,B>::propagate(Space& home, const ModEventDelta&) { if ((x0.min() == 0.0) && (x0.max() == 0.0)) return ES_FAILED; GECODE_ME_CHECK(x1.eq(home,pow(x0.domain(),m_n)));
if ((x1.min() == 0.0) && (x1.max() == 0.0)) { GECODE_ME_CHECK(x1.eq(home,0.0)); return home.ES_SUBSUMED(*this); }
if ((m_n % 2) == 0) { if (x0.min() >= 0) GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),m_n))); else if (x0.max() <= 0) GECODE_ME_CHECK(x0.eq(home,-nroot(x1.domain(),m_n))); else GECODE_ME_CHECK(x0.eq(home, hull( nroot(x1.domain(),m_n), -nroot(x1.domain(),m_n) ) )); } else { GECODE_ME_CHECK(x0.eq(home,nroot(x1.domain(),m_n))); } return x0.assigned() ? home.ES_SUBSUMED(*this) : ES_FIX; }
/* * Bounds consistent square root operator * */
template<class A, class B> forceinline NthRoot<A,B>::NthRoot(Home home, A x0, B x1, int n) : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1), m_n(n) {}
template<class A, class B> ExecStatus NthRoot<A,B>::post(Home home, A x0, B x1, int n) { if (n == 0) return ES_FAILED; GECODE_ME_CHECK(x0.gq(home,0.0)); GECODE_ME_CHECK(x1.eq(home,nroot(x0.domain(),n))); GECODE_ME_CHECK(x0.eq(home,pow(x1.domain(),n))); (void) new (home) NthRoot<A,B>(home,x0,x1,n); return ES_OK; }
template<class A, class B> forceinline NthRoot<A,B>::NthRoot(Space& home, NthRoot<A,B>& p) : MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,p), m_n(p.m_n) {}
template<class A, class B> Actor* NthRoot<A,B>::copy(Space& home) { return new (home) NthRoot<A,B>(home,*this); }
template<class A, class B> ExecStatus NthRoot<A,B>::propagate(Space& home, const ModEventDelta&) { GECODE_ME_CHECK(x1.eq(home,nroot(x0.domain(),m_n))); GECODE_ME_CHECK(x0.eq(home,pow(x1.domain(),m_n))); return x0.assigned() ? home.ES_SUBSUMED(*this) : ES_FIX; }
}}}
// STATISTICS: float-prop