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-rw-r--r--impl/Complete.hpp6
-rw-r--r--impl/Expression.hpp6
-rw-r--r--impl/MaxStrategy.hpp89
-rw-r--r--impl/VariableAssignment.hpp47
-rw-r--r--impl/gmon.outbin76225 -> 0 bytes
-rw-r--r--impl/main.cpp15
-rw-r--r--impl/systems/gmon.outbin75981 -> 0 bytes
-rw-r--r--impl/systems/test.eqns32
-rw-r--r--impl/test/7.eqns8
-rw-r--r--impl/test/7.soln8
10 files changed, 170 insertions, 41 deletions
diff --git a/impl/Complete.hpp b/impl/Complete.hpp
index 8c5559a..e3ec15a 100644
--- a/impl/Complete.hpp
+++ b/impl/Complete.hpp
@@ -40,7 +40,11 @@ struct Complete {
return Complete<T>(- _value, _infinity);
}
Complete operator+(const Complete& other) const {
- if (_infinity) {
+ if (_infinity && other._infinity) {
+ if (_value > 0 || other._value > 0)
+ return Complete<T>(1, true);
+ return Complete<T>(-1, true);
+ } else if (_infinity) {
return *this;
} else if (other._infinity) {
return other;
diff --git a/impl/Expression.hpp b/impl/Expression.hpp
index 0d48d70..9c4ac9f 100644
--- a/impl/Expression.hpp
+++ b/impl/Expression.hpp
@@ -110,6 +110,10 @@ struct OperatorExpression : public Expression<Domain> {
return _operator.eval(argumentValues);
}
+ std::vector<Expression<Domain>*>& arguments() {
+ return _arguments;
+ }
+
const std::vector<Expression<Domain>*>& arguments() const {
return _arguments;
}
@@ -141,7 +145,7 @@ struct OperatorExpression : public Expression<Domain> {
private:
const Operator<Domain>& _operator;
protected:
- const std::vector<Expression<Domain>*> _arguments;
+ std::vector<Expression<Domain>*> _arguments;
};
template<typename Domain>
diff --git a/impl/MaxStrategy.hpp b/impl/MaxStrategy.hpp
index 96aeef4..f4026dd 100644
--- a/impl/MaxStrategy.hpp
+++ b/impl/MaxStrategy.hpp
@@ -10,6 +10,9 @@ template<typename Domain>
struct MaxStrategy {
virtual ~MaxStrategy() { }
virtual unsigned int get(const MaxExpression<Domain>& e) const = 0;
+ virtual unsigned int get(const MaxExpression<Domain>& e) {
+ return const_cast<const MaxStrategy*>(this)->get(e);
+ }
};
unsigned int stack_depth = 1;
@@ -38,20 +41,38 @@ struct DynamicMaxStrategy : public MaxStrategy<Domain> {
_influence(system.maxExpressionCount(),
IdSet<MaxExpression<Domain> >(system.maxExpressionCount())),
_var_influence(system.variableCount(),
- IdSet<MaxExpression<Domain> >(system.maxExpressionCount()))
+ IdSet<MaxExpression<Domain> >(system.maxExpressionCount())),
+ _frozen(false)
{}
+ void freeze() {
+ _frozen = true;
+ }
+
+ void thaw() {
+ _frozen = false;
+ }
+
+ bool is_frozen() {
+ return _frozen;
+ }
+
void setRho(DynamicVariableAssignment<Domain>& rho) {
_rho = &rho;
}
unsigned int get(const MaxExpression<Domain>& e) const {
- solve(e);
return _values[e];
}
- void invalidate(const Variable<Domain>& v) const {
- log::strategy << indent() << "Invalidating " << v << " - " << *_system[v] << std::endl;
+ unsigned int get(const MaxExpression<Domain>& e) {
+ if (!_frozen)
+ solve(e);
+ return _values[e];
+ }
+
+ void invalidate(const Variable<Domain>& v) {
+ log::strategy << indent() << "Invalidating " << v << " - " << *_system[v] << std::endl;
_stable.filter(_var_influence[v]);
IdSet<MaxExpression<Domain> > infl = _var_influence[v];
@@ -67,7 +88,7 @@ struct DynamicMaxStrategy : public MaxStrategy<Domain> {
}
private:
- void solve(const MaxExpression<Domain>& x) const {
+ void solve(const MaxExpression<Domain>& x) {
if (!_stable.contains(x)) {
_stable.insert(x);
log::strategy << indent() << "Stabilise " << x << std::endl;
@@ -106,7 +127,7 @@ private:
}
struct DependencyAssignment : public VariableAssignment<Domain>{
- DependencyAssignment(const DynamicMaxStrategy& strat,
+ DependencyAssignment(DynamicMaxStrategy& strat,
VariableAssignment<Domain>& rho,
const MaxExpression<Domain>& expr)
: _strat(strat),
@@ -118,13 +139,13 @@ private:
return _rho[var];
}
private:
- const DynamicMaxStrategy& _strat;
+ DynamicMaxStrategy& _strat;
VariableAssignment<Domain>& _rho;
const MaxExpression<Domain>& _expr;
};
struct DependencyStrategy : public MaxStrategy<Domain> {
- DependencyStrategy(const DynamicMaxStrategy& strat, const MaxExpression<Domain>& expr)
+ DependencyStrategy(DynamicMaxStrategy& strat, const MaxExpression<Domain>& expr)
: _strat(strat),
_expr(expr) {
}
@@ -136,19 +157,57 @@ private:
return _strat._values[e];
}
private:
- const DynamicMaxStrategy& _strat;
+ DynamicMaxStrategy& _strat;
const MaxExpression<Domain>& _expr;
};
-private:
+private:
const EquationSystem<Domain>& _system;
- mutable DynamicVariableAssignment<Domain>* _rho;
- mutable IdMap<MaxExpression<Domain>,unsigned int> _values;
- mutable IdSet<MaxExpression<Domain> > _stable;
- mutable IdMap<MaxExpression<Domain>,IdSet<MaxExpression<Domain> > > _influence;
- mutable IdMap<Variable<Domain>,IdSet<MaxExpression<Domain> > > _var_influence;
+ DynamicVariableAssignment<Domain>* _rho;
+ IdMap<MaxExpression<Domain>,unsigned int> _values;
+ IdSet<MaxExpression<Domain> > _stable;
+ IdMap<MaxExpression<Domain>,IdSet<MaxExpression<Domain> > > _influence;
+ IdMap<Variable<Domain>,IdSet<MaxExpression<Domain> > > _var_influence;
+ bool _frozen;
};
+
+template<typename T>
+IdMap<Variable<T>,T> solve_for(const EquationSystem<T>& system) {
+ IdMap<Variable<T>,T> result(system.variableCount(), infinity<T>());
+
+ DynamicMaxStrategy<T> strategy(system);
+ DynamicVariableAssignment<T> rho(system, strategy, -infinity<T>());
+ strategy.setRho(rho);
+
+ bool changed;
+ do {
+ changed = false;
+
+ // improve strategy
+ rho.freeze();
+ strategy.thaw();
+ for (unsigned int i = 0; i < system.variableCount(); ++i) {
+ strategy.get(*system[system.variable(i)]);
+ }
+
+ // iterate fixpoint
+ strategy.freeze();
+ rho.thaw();
+ for (unsigned int i = 0; i < system.variableCount(); ++i) {
+ Variable<T>& var = system.variable(i);
+ T val = rho[var];
+ if (result[var] != val) {
+ result[var] = val;
+ changed = true;
+ }
+ }
+ } while(changed);
+
+ return result;
+}
+
+
/*template<typename Domain>
std::ostream& operator<<(std::ostream& cout, const MaxStrategy<Domain>& strat) {
strat.print(cout);
diff --git a/impl/VariableAssignment.hpp b/impl/VariableAssignment.hpp
index a9247b5..2a63756 100644
--- a/impl/VariableAssignment.hpp
+++ b/impl/VariableAssignment.hpp
@@ -8,6 +8,9 @@ template<typename Domain>
struct VariableAssignment {
virtual ~VariableAssignment() { }
virtual const Domain& operator[](const Variable<Domain>&) const = 0;
+ virtual const Domain& operator[](const Variable<Domain>& x) {
+ return (*const_cast<const VariableAssignment*>(this))[x];
+ }
};
#include "EquationSystem.hpp"
@@ -19,21 +22,40 @@ template<typename Domain>
struct DynamicVariableAssignment : public VariableAssignment<Domain> {
DynamicVariableAssignment(
const EquationSystem<Domain>& system,
- const DynamicMaxStrategy<Domain>& strat
+ DynamicMaxStrategy<Domain>& strat,
+ const Domain& value=infinity<Domain>()
) : _system(system),
_strategy(strat),
- _values(system.variableCount(), infinity<Domain>()),
+ _values(system.variableCount(), value),
_stable(system.variableCount()),
_influence(system.variableCount(),
- IdSet<Variable<Domain> >(system.variableCount()))
+ IdSet<Variable<Domain> >(system.variableCount())),
+ _frozen(false)
{ }
+ void freeze() {
+ _frozen = true;
+ }
+
+ void thaw() {
+ _frozen = false;
+ }
+
+ bool is_frozen() {
+ return _frozen;
+ }
+
const Domain& operator[](const Variable<Domain>& var) const {
- solve(var);
return _values[var];
}
- void invalidate(const Variable<Domain>& x) const {
+ const Domain& operator[](const Variable<Domain>& var) {
+ if (!_frozen)
+ solve(var);
+ return _values[var];
+ }
+
+ void invalidate(const Variable<Domain>& x) {
log::fixpoint << indent() << "Invalidating " << x << std::endl;
if (_stable.contains(x)) {
_stable.remove(x);
@@ -53,7 +75,7 @@ struct DynamicVariableAssignment : public VariableAssignment<Domain> {
private:
- void solve(const Variable<Domain>& x) const {
+ void solve(const Variable<Domain>& x) {
if (!_stable.contains(x)) {
_stable.insert(x);
log::fixpoint << indent() << "Stabilise " << x << std::endl;
@@ -90,7 +112,7 @@ private:
}
struct DependencyAssignment : public VariableAssignment<Domain> {
- DependencyAssignment(const DynamicVariableAssignment& assignment, const Variable<Domain>& var)
+ DependencyAssignment(DynamicVariableAssignment& assignment, const Variable<Domain>& var)
: _assignment(assignment), _var(var) { }
const Domain& operator[](const Variable<Domain>& x) const {
const Domain& result = _assignment[x];
@@ -98,15 +120,16 @@ private:
return result;
}
private:
- const DynamicVariableAssignment& _assignment;
+ DynamicVariableAssignment& _assignment;
const Variable<Domain>& _var;
};
const EquationSystem<Domain>& _system;
- const DynamicMaxStrategy<Domain>& _strategy;
- mutable IdMap<Variable<Domain>, Domain> _values;
- mutable IdSet<Variable<Domain> > _stable;
- mutable IdMap<Variable<Domain>,IdSet<Variable<Domain> > > _influence;
+ DynamicMaxStrategy<Domain>& _strategy;
+ IdMap<Variable<Domain>, Domain> _values;
+ IdSet<Variable<Domain> > _stable;
+ IdMap<Variable<Domain>,IdSet<Variable<Domain> > > _influence;
+ bool _frozen;
};
#endif
diff --git a/impl/gmon.out b/impl/gmon.out
deleted file mode 100644
index f33c245..0000000
--- a/impl/gmon.out
+++ /dev/null
Binary files differ
diff --git a/impl/main.cpp b/impl/main.cpp
index e3e0ae3..84f17dd 100644
--- a/impl/main.cpp
+++ b/impl/main.cpp
@@ -140,6 +140,20 @@ int main (int argc, char* argv[]) {
log::debug << system << endl;
system.indexMaxExpressions(); // make reverse-lookup O(1) instead of O(n)
+ IdMap<Variable<ZBar>,ZBar> result = solve_for(system);
+ if (variables.size() > 0) {
+ for (unsigned int i = 0, size = system.variableCount(); i < size; ++i) {
+ Variable<ZBar>& var = system.variable(i);
+ if (variables.find(var.name()) != variables.end())
+ cout << var.name() << " = " << result[var] << endl;
+ }
+ } else {
+ for (unsigned int i = 0, size = system.variableCount(); i < size; ++i) {
+ Variable<ZBar>& var = system.variable(i);
+ cout << var.name() << " = " << result[var] << endl;
+ }
+ }
+ /*
DynamicMaxStrategy<ZBar> strategy(system);
DynamicVariableAssignment<ZBar> rho(system, strategy);
strategy.setRho(rho);
@@ -156,6 +170,7 @@ int main (int argc, char* argv[]) {
cout << var.name() << " = " << rho[var] << endl;
}
}
+ */
parser -> free(parser);
tokens -> free(tokens);
diff --git a/impl/systems/gmon.out b/impl/systems/gmon.out
deleted file mode 100644
index b5abe0e..0000000
--- a/impl/systems/gmon.out
+++ /dev/null
Binary files differ
diff --git a/impl/systems/test.eqns b/impl/systems/test.eqns
index af18a57..a3b521d 100644
--- a/impl/systems/test.eqns
+++ b/impl/systems/test.eqns
@@ -1,12 +1,20 @@
-i-4[0] = max(-inf, 0)
-negi-4[0] = max(-inf, 0)
-negi-1-pre = max(-inf, guard(add(min(negi-4[0], inf), min(i-4[0], inf)), 0, negi-4[0]), guard(add(min(negi-2-pre, inf), min(i-2-pre, inf)), 0, negi-2-pre))
-i-1-pre = max(-inf, guard(add(min(negi-4[0], inf), min(i-4[0], inf)), 0, i-4[0]), guard(add(min(negi-2-pre, inf), min(i-2-pre, inf)), 0, i-2-pre))
-negi-3-pre = max(-inf, guard(add(min(negi-1-pre, inf), min(i-1-pre, 2)), 0, negi-1-pre))
-i-3-pre = max(-inf, guard(add(min(negi-1-pre, inf), min(i-1-pre, 2)), 0, min(2, i-1-pre)))
-negi-0-pre = max(-inf, guard(add(min(negi-1-pre, -3), min(i-1-pre, inf)), 0, min(-3, negi-1-pre)))
-i-0-pre = max(-inf, guard(add(min(negi-1-pre, -3), min(i-1-pre, inf)), 0, i-1-pre))
-i-3[0] = max(-inf, add(0, i-3-pre))
-negi-3[0] = max(-inf, add(0, negi-3-pre))
-negi-2-pre = max(-inf, guard(add(min(negi-3[0], inf), min(i-3[0], inf)), 0, negi-3[0]))
-i-2-pre = max(-inf, guard(add(min(negi-3[0], inf), min(i-3[0], inf)), 0, i-3[0]))
+i-6[0] = max(-inf, 0)
+neg-i-6[0] = max(-inf, 0)
+neg-i-1-pre = max(-inf, guard(add(min(neg-i-6[0], inf), min(i-6[0], inf)), 0, neg-i-6[0]), guard(add(min(neg-i-2[0], inf), min(i-2[0], inf)), 0, neg-i-2[0]))
+i-1-pre = max(-inf, guard(add(min(neg-i-6[0], inf), min(i-6[0], inf)), 0, i-6[0]), guard(add(min(neg-i-2[0], inf), min(i-2[0], inf)), 0, i-2[0]))
+neg-i-5-pre = max(-inf, guard(add(min(neg-i-1-pre, inf), min(i-1-pre, 2)), 0, neg-i-1-pre))
+i-5-pre = max(-inf, guard(add(min(neg-i-1-pre, inf), min(i-1-pre, 2)), 0, min(2, i-1-pre)))
+neg-i-0-pre = max(-inf, guard(add(min(neg-i-1-pre, -3), min(i-1-pre, inf)), 0, min(-3, neg-i-1-pre)))
+i-0-pre = max(-inf, guard(add(min(neg-i-1-pre, -3), min(i-1-pre, inf)), 0, i-1-pre))
+neg-i-4-pre = max(-inf, guard(add(min(neg-i-5-pre, inf), min(i-5-pre, 1)), 0, neg-i-5-pre))
+i-4-pre = max(-inf, guard(add(min(neg-i-5-pre, inf), min(i-5-pre, 1)), 0, min(1, i-5-pre)))
+neg-i-3-pre = max(-inf, guard(add(min(neg-i-5-pre, -2), min(i-5-pre, inf)), 0, min(-2, neg-i-5-pre)))
+i-3-pre = max(-inf, guard(add(min(neg-i-5-pre, -2), min(i-5-pre, inf)), 0, i-5-pre))
+i-4[0] = max(-inf, add(1, i-4-pre))
+neg-i-4[0] = max(-inf, add(-1, neg-i-4-pre))
+neg-i-2-pre = max(-inf, guard(add(min(neg-i-4[0], inf), min(i-4[0], inf)), 0, neg-i-4[0]), guard(add(min(neg-i-3[0], inf), min(i-3[0], inf)), 0, neg-i-3[0]))
+i-2-pre = max(-inf, guard(add(min(neg-i-4[0], inf), min(i-4[0], inf)), 0, i-4[0]), guard(add(min(neg-i-3[0], inf), min(i-3[0], inf)), 0, i-3[0]))
+i-3[0] = max(-inf, 10)
+neg-i-3[0] = max(-inf, -10)
+i-2[0] = max(-inf, add(1, i-2-pre))
+neg-i-2[0] = max(-inf, add(-1, neg-i-2-pre))
diff --git a/impl/test/7.eqns b/impl/test/7.eqns
new file mode 100644
index 0000000..2789f0e
--- /dev/null
+++ b/impl/test/7.eqns
@@ -0,0 +1,8 @@
+x = 0
+y = max(-inf, x, a)
+a = b
+b = c
+c = d
+d = e
+e = f
+f = y
diff --git a/impl/test/7.soln b/impl/test/7.soln
new file mode 100644
index 0000000..0d85468
--- /dev/null
+++ b/impl/test/7.soln
@@ -0,0 +1,8 @@
+x = 0
+y = 0
+a = 0
+b = 0
+c = 0
+d = 0
+e = 0
+f = 0
generated by cgit v1.2.3 (git 2.46.0) at 2024-09-20 03:57:44 +0000