sqr-sqrt-abs.hpp /usr/include/gecode/float/arithmetic.hh /usr/include/gecode/float/arithmetic/sqr-sqrt-abs.hpp /usr/include/gecode/float/arithmetic.hh Gecode Gecode::Float Gecode::Float::Arithmetic /*-*-mode:C++;c-basic-offset:2;indent-tabs-mode:nil-*-*/ /* *Mainauthors: *ChristianSchulte<schulte@gecode.org> *GuidoTack<tack@gecode.org> *VincentBarichard<Vincent.Barichard@univ-angers.fr> * *Copyright: *ChristianSchulte,2004 *GuidoTack,2006 *VincentBarichard,2012 * *Lastmodified: *$Date:2013-02-0421:28:39+0100(Mon,04Feb2013)$by$Author:schulte$ *$Revision:13262$ * *ThisfileispartofGecode,thegenericconstraint *developmentenvironment: *http://www.gecode.org * *Permissionisherebygranted,freeofcharge,toanypersonobtaining *acopyofthissoftwareandassociateddocumentationfiles(the *"Software"),todealintheSoftwarewithoutrestriction,including *withoutlimitationtherightstouse,copy,modify,merge,publish, *distribute,sublicense,and/orsellcopiesoftheSoftware,andto *permitpersonstowhomtheSoftwareisfurnishedtodoso,subjectto *thefollowingconditions: * *Theabovecopyrightnoticeandthispermissionnoticeshallbe *includedinallcopiesorsubstantialportionsoftheSoftware. * *THESOFTWAREISPROVIDED"ASIS",WITHOUTWARRANTYOFANYKIND, *EXPRESSORIMPLIED,INCLUDINGBUTNOTLIMITEDTOTHEWARRANTIESOF *MERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEAND *NONINFRINGEMENT.INNOEVENTSHALLTHEAUTHORSORCOPYRIGHTHOLDERSBE *LIABLEFORANYCLAIM,DAMAGESOROTHERLIABILITY,WHETHERINANACTION *OFCONTRACT,TORTOROTHERWISE,ARISINGFROM,OUTOFORINCONNECTION *WITHTHESOFTWAREORTHEUSEOROTHERDEALINGSINTHESOFTWARE. * */ namespaceGecode{namespaceFloat{namespaceArithmetic{ /* *Positiveboundsconsistentsquaring * */ template<classVA,classVB> forceinline SqrPlus<VA,VB>::SqrPlus(Homehome,VAx0,VBx1) :MixBinaryPropagator<VA,PC_FLOAT_BND,VB,PC_FLOAT_BND>(home,x0,x1){} template<classVA,classVB> forceinlineExecStatus SqrPlus<VA,VB>::post(Homehome,VAx0,VBx1){ if(same(x0,x1)){ if(x0.assigned()) return((x0.val()==0)||(x0.val()==1))?ES_OK:ES_FAILED; }else{ GECODE_ME_CHECK(x0.eq(home,sqrt(x1.val()))); GECODE_ME_CHECK(x1.eq(home,sqr(x0.val()))); } (void)new(home)SqrPlus<VA,VB>(home,x0,x1); returnES_OK; } template<classVA,classVB> forceinline SqrPlus<VA,VB>::SqrPlus(Space&home,boolshare,SqrPlus<VA,VB>&p) :MixBinaryPropagator<VA,PC_FLOAT_BND,VB,PC_FLOAT_BND>(home,share,p){} template<classVA,classVB> Actor* SqrPlus<VA,VB>::copy(Space&home,boolshare){ returnnew(home)SqrPlus<VA,VB>(home,share,*this); } template<classVA,classVB> ExecStatus SqrPlus<VA,VB>::propagate(Space&home,constModEventDelta&){ if(same(x0,x1)){ if(x0.max()<1)GECODE_ME_CHECK(x0.eq(home,0)); elseif(x0.min()>0)GECODE_ME_CHECK(x0.eq(home,1)); if(x0.assigned()) return((x0.val()==0)||(x0.val()==1))?home.ES_SUBSUMED(*this):ES_FAILED; }else{ GECODE_ME_CHECK(x0.eq(home,sqrt(x1.val()))); GECODE_ME_CHECK(x1.eq(home,sqr(x0.val()))); if(x0.assigned()||x1.assigned())returnhome.ES_SUBSUMED(*this); } returnES_FIX; } /* *Boundsconsistentsquaring * */ template<classView> forceinline Sqr<View>::Sqr(Homehome,Viewx0,Viewx1) :BinaryPropagator<View,PC_FLOAT_BND>(home,x0,x1){} template<classView> forceinlineExecStatus Sqr<View>::post(Homehome,Viewx0,Viewx1){ GECODE_ME_CHECK(x1.gq(home,0)); if(same(x0,x1)){ if(x0.assigned()) return((x0.val()==0)||(x0.val()==1))?ES_OK:ES_FAILED; GECODE_ME_CHECK(x1.lq(home,1)); returnSqrPlus<FloatView,FloatView>::post(home,x0,x1); }else{ if(x0.min()>=0) returnSqrPlus<FloatView,FloatView>::post(home,x0,x1); if(x0.max()<=0) returnSqrPlus<MinusView,FloatView>::post(home,MinusView(x0),x1); GECODE_ME_CHECK(x1.eq(home,sqr(x0.val()))); (void)new(home)Sqr<View>(home,x0,x1); } returnES_OK; } template<classView> forceinline Sqr<View>::Sqr(Space&home,boolshare,Sqr<View>&p) :BinaryPropagator<View,PC_FLOAT_BND>(home,share,p){} template<classView> Actor* Sqr<View>::copy(Space&home,boolshare){ returnnew(home)Sqr<View>(home,share,*this); } template<classView> ExecStatus Sqr<View>::propagate(Space&home,constModEventDelta&){ assert(x1.min()>=0); if(x0.min()>=0) GECODE_REWRITE(*this,(SqrPlus<FloatView,FloatView>::post(home(*this),x0,x1))); if(x0.max()<=0) GECODE_REWRITE(*this,(SqrPlus<MinusView,FloatView>::post(home(*this), MinusView(x0),x1))); GECODE_ME_CHECK(x1.eq(home,sqr(x0.val()))); Roundingr; FloatValz=sqrt(x1.val()); if(x0.min()>-r.sqrt_up(x1.min())) GECODE_ME_CHECK(x0.eq(home,z)); elseif(x0.max()<r.sqrt_down(x1.min())) GECODE_ME_CHECK(x0.eq(home,-z)); else GECODE_ME_CHECK(x0.eq(home,hull(z,-z))); returnES_NOFIX; } /* *Boundsconsistentsquarerootoperator * */ template<classA,classB> forceinline Sqrt<A,B>::Sqrt(Homehome,Ax0,Bx1) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1){} template<classA,classB> ExecStatus Sqrt<A,B>::post(Homehome,Ax0,Bx1){ GECODE_ME_CHECK(x0.gq(home,0)); if(same(x0,x1)){ if(x0.assigned()) return((x0.val()==0)||(x0.val()==1))?ES_OK:ES_FAILED; GECODE_ME_CHECK(x0.lq(home,1)); (void)new(home)Sqrt<A,B>(home,x0,x1); }else{ GECODE_ME_CHECK(x1.eq(home,sqrt(x0.val()))); (void)new(home)Sqrt<A,B>(home,x0,x1); } returnES_OK; } template<classA,classB> forceinline Sqrt<A,B>::Sqrt(Space&home,boolshare,Sqrt<A,B>&p) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p){} template<classA,classB> Actor* Sqrt<A,B>::copy(Space&home,boolshare){ returnnew(home)Sqrt<A,B>(home,share,*this); } template<classA,classB> ExecStatus Sqrt<A,B>::propagate(Space&home,constModEventDelta&){ if(same(x0,x1)){ if(x0.max()<1)GECODE_ME_CHECK(x0.eq(home,0)); elseif(x0.min()>0)GECODE_ME_CHECK(x0.eq(home,1)); if(x0.assigned()) return((x0.val()==0)||(x0.val()==1))?home.ES_SUBSUMED(*this):ES_FAILED; }else{ GECODE_ME_CHECK(x0.eq(home,sqr(x1.val()))); GECODE_ME_CHECK(x1.eq(home,sqrt(x0.val()))); if(x0.assigned()||x1.assigned())returnhome.ES_SUBSUMED(*this); } returnES_FIX; } /* *Absoluteconsistentsquareoperator * */ template<classA,classB> forceinline Abs<A,B>::Abs(Homehome,Ax0,Bx1) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,x0,x1){} template<classA,classB> ExecStatus Abs<A,B>::post(Homehome,Ax0,Bx1){ (void)new(home)Abs<A,B>(home,x0,x1); returnES_OK; } template<classA,classB> forceinline Abs<A,B>::Abs(Space&home,boolshare,Abs<A,B>&p) :MixBinaryPropagator<A,PC_FLOAT_BND,B,PC_FLOAT_BND>(home,share,p){} template<classA,classB> Actor* Abs<A,B>::copy(Space&home,boolshare){ returnnew(home)Abs<A,B>(home,share,*this); } template<classA,classB> ExecStatus Abs<A,B>::propagate(Space&home,constModEventDelta&){ GECODE_ME_CHECK(x1.eq(home,abs(x0.val()))); if(x0.min()>=0) GECODE_ME_CHECK(x0.eq(home,FloatVal(x1.min(),x1.max()))); elseif(x0.max()<=0) GECODE_ME_CHECK(x0.eq(home,FloatVal(-x1.max(),-x1.min()))); else GECODE_ME_CHECK(x0.eq(home,FloatVal(-x1.max(),x1.max()))); return(x0.assigned()&&x1.assigned())?home.ES_SUBSUMED(*this):ES_FIX; } }}} //STATISTICS:float-prop