trsen.h (flens/lapack/impl/trsen.h)

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/*

 *   Copyright (c) 2011, Michael Lehn

 *

 *   All rights reserved.

 *

 *   Redistribution and use in source and binary forms, with or without

 *   modification, are permitted provided that the following conditions

 *   are met:

 *

 *   1) Redistributions of source code must retain the above copyright

 *      notice, this list of conditions and the following disclaimer.

 *   2) Redistributions in binary form must reproduce the above copyright

 *      notice, this list of conditions and the following disclaimer in

 *      the documentation and/or other materials provided with the

 *      distribution.

 *   3) Neither the name of the FLENS development group nor the names of

 *      its contributors may be used to endorse or promote products derived

 *      from this software without specific prior written permission.

 *

 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/* Based on

 *

       SUBROUTINE DTRSEN( JOB, COMPQ, SELECT, N, T, LDT, Q, LDQ, WR, WI,

      $                   M, S, SEP, WORK, LWORK, IWORK, LIWORK, INFO )

 *

 *  -- LAPACK routine (version 3.3.1) --

 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --

 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--

 *  -- April 2011                                                      --

 *

 */

#ifndef FLENS_LAPACK_IMPL_TRSEN_H

#define FLENS_LAPACK_IMPL_TRSEN_H 1

#include <cxxstd/cmath.h>

#include <flens/lapack/typedefs.h>

#include <flens/matrixtypes/matrixtypes.h>

#include <flens/vectortypes/vectortypes.h>

namespace flens { namespace lapack {

namespace TRSEN {

    enum Job {

        None = 'N',                 // = 'N': none;

        EigenvaluesOnly = 'E',      // = 'E': for eigenvalues only (S);

        InvariantSubspaceOnly = 'V',// = 'V': for invariant subspace only (SEP);

        Both = 'B'                  // = 'B': for both eigenvalues and invariant

                                    //        subspace (S and SEP).

    };

}

//== trsen =====================================================================

template <typename SELECT, typename MT, typename MQ, typename WR, typename WI,

          typename IndexType, typename S, typename SEP,

          typename WORK, typename IWORK>

    IndexType

    trsen(TRSEN::Job                job,

          bool                      computeQ,

          const DenseVector<SELECT> &select,

          GeMatrix<MT>              &T,

          GeMatrix<MQ>              &Q,

          DenseVector<WR>           &wr,

          DenseVector<WI>           &wi,

          IndexType                 &m,

          S                         &s,

          SEP                       &sep,

          DenseVector<WORK>         &work,

          DenseVector<IWORK>        &iwork);

//-- forwarding ----------------------------------------------------------------

template <typename SELECT, typename MT, typename MQ, typename WR, typename WI,

          typename IndexType, typename S, typename SEP,

          typename WORK, typename IWORK>

    IndexType

    trsen(TRSEN::Job                job,

          bool                      computeQ,

          const DenseVector<SELECT> &select,

          MT                        &&T,

          MQ                        &&Q,

          WR                        &&wr,

          WI                        &&wi,

          IndexType                 &&m,

          S                         &&s,

          SEP                       &&sep,

          WORK                      &&work,

          IWORK                     &&iwork);

} } // namespace lapack, flens

#endif // FLENS_LAPACK_IMPL_TRSEN_H