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Add special path for matrix<complex>/real.

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This also fixes underflow issues when scaling complex matrices through complex/complex operator.
This commit is contained in:
Gael Guennebaud
2015-06-26 16:08:15 +02:00
parent e102ddbf1f
commit 98ff17eb9e
6 changed files with 33 additions and 1 deletions
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12
Eigen/src/Core/functors/BinaryFunctors.h
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@@ -392,6 +392,18 @@ template<typename Scalar>
struct functor_traits<scalar_quotient1_op<Scalar> >
{ enum { Cost = 2 * NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasDiv }; };
template<typename Scalar1, typename Scalar2>
struct scalar_quotient2_op {
typedef typename scalar_product_traits<Scalar1,Scalar2>::ReturnType result_type;
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE scalar_quotient2_op(const scalar_quotient2_op& other) : m_other(other.m_other) { }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE scalar_quotient2_op(const Scalar2& other) : m_other(other) { }
EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE result_type operator() (const Scalar1& a) const { return a / m_other; }
typename add_const_on_value_type<typename NumTraits<Scalar2>::Nested>::type m_other;
};
template<typename Scalar1,typename Scalar2>
struct functor_traits<scalar_quotient2_op<Scalar1,Scalar2> >
{ enum { Cost = 2 * NumTraits<Scalar1>::MulCost, PacketAccess = false }; };
// In Eigen, any binary op (Product, CwiseBinaryOp) require the Lhs and Rhs to have the same scalar type, except for multiplication
// where the mixing of different types is handled by scalar_product_traits
// In particular, real * complex<real> is allowed.