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* support for matrix-scalar quotient with integer scalar types.

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* added cache efficient matrix-matrix product.
   - provides a huge speed-up for large matrices.
   - currently it is enabled when an explicit unrolling is not possible.
This commit is contained in:
Gael Guennebaud
2008-03-21 20:26:14 +00:00
parent 0ef1efdbdb
commit 4342f024d9
7 changed files with 116 additions and 22 deletions
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35
Eigen/src/Core/CwiseUnaryOp.h
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@@ -208,6 +208,34 @@ struct ei_scalar_multiple_op {
const Scalar m_other;
};
template<typename Scalar, bool HasFloatingPoint>
struct ei_scalar_quotient1_impl {
ei_scalar_quotient1_impl(const Scalar& other) : m_other(static_cast<Scalar>(1) / other) {}
Scalar operator() (const Scalar& a) const { return a * m_other; }
const Scalar m_other;
};
template<typename Scalar>
struct ei_scalar_quotient1_impl<Scalar,false> {
ei_scalar_quotient1_impl(const Scalar& other) : m_other(other) {}
Scalar operator() (const Scalar& a) const { return a / m_other; }
const Scalar m_other;
};
/** \internal
* \brief Template functor to divide a scalar by a fixed other one
*
* This functor is used to implement the quotient of a matrix by
* a scalar where the scalar type is not a floating point type.
*
* \sa class CwiseUnaryOp, MatrixBase::operator/
*/
template<typename Scalar>
struct ei_scalar_quotient1_op : ei_scalar_quotient1_impl<Scalar, NumTraits<Scalar>::HasFloatingPoint > {
ei_scalar_quotient1_op(const Scalar& other)
: ei_scalar_quotient1_impl<Scalar, NumTraits<Scalar>::HasFloatingPoint >(other) {}
};
/** \relates MatrixBase */
template<typename Derived>
const CwiseUnaryOp<ei_scalar_multiple_op<typename ei_traits<Derived>::Scalar>, Derived>
@@ -219,12 +247,11 @@ MatrixBase<Derived>::operator*(const Scalar& scalar) const
/** \relates MatrixBase */
template<typename Derived>
const CwiseUnaryOp<ei_scalar_multiple_op<typename ei_traits<Derived>::Scalar>, Derived>
const CwiseUnaryOp<ei_scalar_quotient1_op<typename ei_traits<Derived>::Scalar>, Derived>
MatrixBase<Derived>::operator/(const Scalar& scalar) const
{
assert(NumTraits<Scalar>::HasFloatingPoint);
return CwiseUnaryOp<ei_scalar_multiple_op<Scalar>, Derived>
(derived(), ei_scalar_multiple_op<Scalar>(static_cast<Scalar>(1) / scalar));
return CwiseUnaryOp<ei_scalar_quotient1_op<Scalar>, Derived>
(derived(), ei_scalar_quotient1_op<Scalar>(scalar));
}
template<typename Derived>