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Fix calls to lazy products (lazy product does not like matrices with 0 length)

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This commit is contained in:
Gael Guennebaud 2014-04-18 17:06:03 +02:00
parent 94684721bd
commit 3454b4e5f1
1 changed files with 3 additions and 3 deletions
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6
Eigen/src/Core/products/GeneralMatrixMatrix.h
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@ -390,7 +390,7 @@ class GeneralProduct<Lhs, Rhs, GemmProduct>
template<typename Dest>
inline void evalTo(Dest& dst) const
{
if((m_rhs.rows()+dst.rows()+dst.cols())<20)
if((m_rhs.rows()+dst.rows()+dst.cols())<20 && m_rhs.rows()>0)
dst.noalias() = m_lhs .lazyProduct( m_rhs );
else
{
@ -402,7 +402,7 @@ class GeneralProduct<Lhs, Rhs, GemmProduct>
template<typename Dest>
inline void addTo(Dest& dst) const
{
if((m_rhs.rows()+dst.rows()+dst.cols())<20)
if((m_rhs.rows()+dst.rows()+dst.cols())<20 && m_rhs.rows()>0)
dst.noalias() += m_lhs .lazyProduct( m_rhs );
else
scaleAndAddTo(dst,Scalar(1));
@ -411,7 +411,7 @@ class GeneralProduct<Lhs, Rhs, GemmProduct>
template<typename Dest>
inline void subTo(Dest& dst) const
{
if((m_rhs.rows()+dst.rows()+dst.cols())<20)
if((m_rhs.rows()+dst.rows()+dst.cols())<20 && m_rhs.rows()>0)
dst.noalias() -= m_lhs .lazyProduct( m_rhs );
else
scaleAndAddTo(dst,Scalar(-1));