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Improve cost estimation of complex division

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This commit is contained in:
Gael Guennebaud 2016-09-21 17:26:04 +02:00
parent 5269d11935
commit ac5377e161
1 changed files with 8 additions and 0 deletions
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8
Eigen/src/Core/util/XprHelper.h
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@ -671,6 +671,14 @@ struct scalar_div_cost {
enum { value = 8*NumTraits<T>::MulCost };
};
template<typename T,bool Vectorized>
struct scalar_div_cost<std::complex<T>, Vectorized> {
enum { value = 2*scalar_div_cost<T>::value
+ 6*NumTraits<T>::MulCost
+ 3*NumTraits<T>::AddCost
};
};
template<bool Vectorized>
struct scalar_div_cost<signed long,Vectorized,typename conditional<sizeof(long)==8,void,false_type>::type> { enum { value = 24 }; };