diff options
Diffstat (limited to 'Eigen/src/Core/products')
| -rw-r--r-- | Eigen/src/Core/products/GeneralMatrixMatrix.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Eigen/src/Core/products/GeneralMatrixMatrix.h b/Eigen/src/Core/products/GeneralMatrixMatrix.h index 508c05c97..8cdf14702 100644 --- a/Eigen/src/Core/products/GeneralMatrixMatrix.h +++ b/Eigen/src/Core/products/GeneralMatrixMatrix.h @@ -471,15 +471,21 @@ struct generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemmProduct> if(a_lhs.cols()==0 || a_lhs.rows()==0 || a_rhs.cols()==0) return; - // Fallback to GEMV if either the lhs or rhs is a runtime vector - if (dst.cols() == 1) + if (dst.cols() == 1 && dst.rows() == 1) { + // Fallback to inner product if both the lhs and rhs is a runtime vector. + dst.coeffRef(0,0) += alpha * (a_lhs.row(0).transpose().cwiseProduct(a_rhs.col(0)).sum()); + return; + } + else if (dst.cols() == 1) { + // Fallback to GEMV if either the lhs or rhs is a runtime vector typename Dest::ColXpr dst_vec(dst.col(0)); return internal::generic_product_impl<Lhs,typename Rhs::ConstColXpr,DenseShape,DenseShape,GemvProduct> ::scaleAndAddTo(dst_vec, a_lhs, a_rhs.col(0), alpha); } else if (dst.rows() == 1) { + // Fallback to GEMV if either the lhs or rhs is a runtime vector typename Dest::RowXpr dst_vec(dst.row(0)); return internal::generic_product_impl<typename Lhs::ConstRowXpr,Rhs,DenseShape,DenseShape,GemvProduct> ::scaleAndAddTo(dst_vec, a_lhs.row(0), a_rhs, alpha); |