lahqr.h (flens/lapack/la/lahqr.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 DLAHQR( WANTT, WANTZ, N, ILO, IHI, H, LDH, WR, WI,
     $                   ILOZ, IHIZ, Z, LDZ, INFO )
*
*  -- LAPACK auxiliary routine (version 3.2) --
*     Univ. of Tennessee, Univ. of California Berkeley,
*     Univ. of Colorado Denver and NAG Ltd..
*     November 2006
*/

#ifndef FLENS_LAPACK_LA_LAHQR_H
#define FLENS_LAPACK_LA_LAHQR_H 1

#include <flens/lapack/typedefs.h>
#include <flens/matrixtypes/matrixtypes.h>
#include <flens/vectortypes/vectortypes.h>

namespace flens { namespace lapack {

//== lahqr =====================================================================
template <typename IndexType, typename MH, typename VWR, typename VWI,
          typename MZ>
    IndexType
    lahqr(bool              wantT,
          bool              wantZ,
          IndexType         iLo,
          IndexType         iHi,
          GeMatrix<MH>      &H,
          DenseVector<VWR>  &wr,
          DenseVector<VWI>  &wi,
          IndexType         iLoZ,
          IndexType         iHiZ,
          GeMatrix<MZ>      &Z);

//-- forwarding ----------------------------------------------------------------
template <typename IndexType, typename MH, typename VWR, typename VWI,
          typename MZ>
    IndexType
    lahqr(bool              wantT,
          bool              wantZ,
          IndexType         iLo,
          IndexType         iHi,
          MH                &&H,
          VWR               &&wr,
          VWI               &&wi,
          IndexType         iLoZ,
          IndexType         iHiZ,
          MZ                &&Z);

} } // namespace lapack, flens

#endif // FLENS_LAPACK_LA_LAHQR_H