1 #include "satencoder.h"
8 #include "tableentry.h"
12 #include "satfuncopencoder.h"
14 Edge encodeOperatorPredicateSATEncoder(SATEncoder * This, BooleanPredicate * constraint) {
15 switch(constraint->encoding.type){
16 case ENUMERATEIMPLICATIONS:
17 return encodeEnumOperatorPredicateSATEncoder(This, constraint);
19 return encodeCircuitOperatorPredicateEncoder(This, constraint);
26 Edge encodeEnumOperatorPredicateSATEncoder(SATEncoder * This, BooleanPredicate * constraint) {
27 PredicateOperator* predicate = (PredicateOperator*)constraint->predicate;
28 uint numDomains=getSizeArraySet(&predicate->domains);
30 FunctionEncodingType encType = constraint->encoding.type;
31 bool generateNegation = encType == ENUMERATEIMPLICATIONSNEGATE;
33 /* Call base encoders for children */
34 for(uint i=0;i<numDomains;i++) {
35 Element *elem = getArrayElement( &constraint->inputs, i);
36 encodeElementSATEncoder(This, elem);
38 VectorEdge * clauses=allocDefVectorEdge(); // Setup array of clauses
40 uint indices[numDomains]; //setup indices
41 bzero(indices, sizeof(uint)*numDomains);
43 uint64_t vals[numDomains]; //setup value array
44 for(uint i=0;i<numDomains; i++) {
45 Set * set=getArraySet(&predicate->domains, i);
46 vals[i]=getSetElement(set, indices[i]);
49 bool notfinished=true;
51 Edge carray[numDomains];
53 if (evalPredicateOperator(predicate, vals) ^ generateNegation) {
54 //Include this in the set of terms
55 for(uint i=0;i<numDomains;i++) {
56 Element * elem = getArrayElement(&constraint->inputs, i);
57 carray[i] = getElementValueConstraint(This, elem, vals[i]);
59 Edge term=constraintAND(This->cnf, numDomains, carray);
60 pushVectorEdge(clauses, term);
64 for(uint i=0;i<numDomains; i++) {
65 uint index=++indices[i];
66 Set * set=getArraySet(&predicate->domains, i);
68 if (index < getSetSize(set)) {
69 vals[i]=getSetElement(set, index);
74 vals[i]=getSetElement(set, 0);
78 if(getSizeVectorEdge(clauses) == 0){
79 deleteVectorEdge(clauses);
82 Edge cor=constraintOR(This->cnf, getSizeVectorEdge(clauses), exposeArrayEdge(clauses));
83 deleteVectorEdge(clauses);
84 return generateNegation ? constraintNegate(cor) : cor;
88 void encodeOperatorElementFunctionSATEncoder(SATEncoder* This, ElementFunction* func) {
90 model_print("Operator Function ...\n");
92 FunctionOperator * function = (FunctionOperator *) func->function;
93 uint numDomains=getSizeArrayElement(&func->inputs);
95 /* Call base encoders for children */
96 for(uint i=0;i<numDomains;i++) {
97 Element *elem = getArrayElement( &func->inputs, i);
98 encodeElementSATEncoder(This, elem);
101 VectorEdge * clauses=allocDefVectorEdge(); // Setup array of clauses
103 uint indices[numDomains]; //setup indices
104 bzero(indices, sizeof(uint)*numDomains);
106 uint64_t vals[numDomains]; //setup value array
107 for(uint i=0;i<numDomains; i++) {
108 Set * set=getElementSet(getArrayElement(&func->inputs, i));
109 vals[i]=getSetElement(set, indices[i]);
112 Edge overFlowConstraint = ((BooleanVar*) func->overflowstatus)->var;
114 bool notfinished=true;
116 Edge carray[numDomains+1];
118 uint64_t result=applyFunctionOperator(function, numDomains, vals);
119 bool isInRange = isInRangeFunction((FunctionOperator*)func->function, result);
120 bool needClause = isInRange;
121 if (function->overflowbehavior == OVERFLOWSETSFLAG || function->overflowbehavior == FLAGIFFOVERFLOW) {
126 //Include this in the set of terms
127 for(uint i=0;i<numDomains;i++) {
128 Element * elem = getArrayElement(&func->inputs, i);
129 carray[i] = getElementValueConstraint(This, elem, vals[i]);
132 carray[numDomains] = getElementValueConstraint(This, &func->base, result);
136 switch(function->overflowbehavior) {
140 clause=constraintIMPLIES(This->cnf,constraintAND(This->cnf, numDomains, carray), carray[numDomains]);
143 case FLAGFORCESOVERFLOW: {
144 clause=constraintIMPLIES(This->cnf,constraintAND(This->cnf, numDomains, carray), constraintAND2(This->cnf, carray[numDomains], constraintNegate(overFlowConstraint)));
147 case OVERFLOWSETSFLAG: {
149 clause=constraintIMPLIES(This->cnf,constraintAND(This->cnf, numDomains, carray), carray[numDomains]);
151 clause=constraintIMPLIES(This->cnf,constraintAND(This->cnf, numDomains, carray), overFlowConstraint);
155 case FLAGIFFOVERFLOW: {
157 clause=constraintIMPLIES(This->cnf,constraintAND(This->cnf, numDomains, carray), constraintAND2(This->cnf, carray[numDomains], constraintNegate(overFlowConstraint)));
159 clause=constraintIMPLIES(This->cnf,constraintAND(This->cnf, numDomains, carray), overFlowConstraint);
167 model_print("added clause in operator function\n");
171 pushVectorEdge(clauses, clause);
175 for(uint i=0;i<numDomains; i++) {
176 uint index=++indices[i];
177 Set * set=getElementSet(getArrayElement(&func->inputs, i));
179 if (index < getSetSize(set)) {
180 vals[i]=getSetElement(set, index);
185 vals[i]=getSetElement(set, 0);
189 if(getSizeVectorEdge(clauses) == 0){
190 deleteVectorEdge(clauses);
193 Edge cor=constraintAND(This->cnf, getSizeVectorEdge(clauses), exposeArrayEdge(clauses));
194 addConstraintCNF(This->cnf, cor);
195 deleteVectorEdge(clauses);
198 Edge encodeCircuitOperatorPredicateEncoder(SATEncoder *This, BooleanPredicate * constraint) {
199 PredicateOperator * predicate = (PredicateOperator*) constraint->predicate;
201 switch(predicate->op) {
203 return encodeCircuitEquals(This, constraint);
211 Edge encodeCircuitEquals(SATEncoder * This, BooleanPredicate * constraint) {
212 PredicateOperator * predicate = (PredicateOperator*) constraint->predicate;
213 ASSERT(getSizeArraySet(&predicate->domains) == 2);
214 Element *elem0 = getArrayElement( &constraint->inputs, 0);
215 Element *elem1 = getArrayElement( &constraint->inputs, 1);
216 ElementEncoding *ee0=getElementEncoding(elem0);
217 ElementEncoding *ee1=getElementEncoding(elem1);
218 ASSERT(ee0->numVars==ee1->numVars);
219 uint numVars=ee0->numVars;
220 Edge carray[numVars];
221 for (uint i=0; i<numVars; i++) {
222 carray[i]=constraintIFF(This->cnf, ee0->variables[i], ee1->variables[i]);
224 return constraintAND(This->cnf, numVars, carray);