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Move CoeffReadCost mechanism to evaluators

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Gael Guennebaud
2014-03-10 23:24:40 +01:00
parent 354bd8a428
commit da6ec81282
27 changed files with 321 additions and 120 deletions
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4
Eigen/src/Core/util/XprHelper.h
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@@ -370,7 +370,9 @@ template<typename T, int n, typename PlainObject = typename eval<T>::type> struc
DynamicAsInteger = 10000,
ScalarReadCost = NumTraits<typename traits<T>::Scalar>::ReadCost,
ScalarReadCostAsInteger = ScalarReadCost == Dynamic ? int(DynamicAsInteger) : int(ScalarReadCost),
CoeffReadCost = traits<T>::CoeffReadCost,
CoeffReadCost = evaluator<T>::CoeffReadCost, // TODO What if an evaluator evaluate itself into a tempory?
// Then CoeffReadCost will be small but we still have to evaluate if n>1...
// The solution might be to ask the evaluator if it creates a temp. Perhaps we could even ask the number of temps?
CoeffReadCostAsInteger = CoeffReadCost == Dynamic ? int(DynamicAsInteger) : int(CoeffReadCost),
NAsInteger = n == Dynamic ? int(DynamicAsInteger) : n,
CostEvalAsInteger = (NAsInteger+1) * ScalarReadCostAsInteger + CoeffReadCostAsInteger,