inline void Gemv(El::Orientation oA,
T alpha, const El::DistMatrix<T, El::VC, El::STAR>& A,
const El::DistMatrix<T, El::STAR, El::STAR>& x,
T beta, El::DistMatrix<T, El::VC, El::STAR>& y) {
// TODO verify sizes etc.
if (oA == El::NORMAL) {
El::Gemv(El::NORMAL,
alpha, A.LockedMatrix(), x.LockedMatrix(),
beta, y.Matrix());
} else {
SKYLARK_THROW_EXCEPTION(base::unsupported_base_operation());
}
}
inline void Gemv(El::Orientation oA,
T alpha, const El::DistMatrix<T, El::VC, El::STAR>& A,
const El::DistMatrix<T, El::VC, El::STAR>& x,
T beta, El::DistMatrix<T, El::STAR, El::STAR>& y) {
// TODO verify sizes etc.
// TODO verify matching grids.
if (oA == El::TRANSPOSE) {
boost::mpi::communicator comm(y.Grid().Comm().comm,
boost::mpi::comm_attach);
El::Matrix<T> ylocal(y.Matrix());
El::Gemv(El::TRANSPOSE,
alpha, A.LockedMatrix(), x.LockedMatrix(),
beta / T(comm.size()), ylocal);
boost::mpi::all_reduce(comm,
ylocal.Buffer(), ylocal.MemorySize(), y.Buffer(),
std::plus<T>());
} else {
SKYLARK_THROW_EXCEPTION(base::unsupported_base_operation());
}
}