1 /*
 2  *   Copyright (c) 2011, Michael Lehn
 3  *
 4  *   All rights reserved.
 5  *
 6  *   Redistribution and use in source and binary forms, with or without
 7  *   modification, are permitted provided that the following conditions
 8  *   are met:
 9  *
10  *   1) Redistributions of source code must retain the above copyright
11  *      notice, this list of conditions and the following disclaimer.
12  *   2) Redistributions in binary form must reproduce the above copyright
13  *      notice, this list of conditions and the following disclaimer in
14  *      the documentation and/or other materials provided with the
15  *      distribution.
16  *   3) Neither the name of the FLENS development group nor the names of
17  *      its contributors may be used to endorse or promote products derived
18  *      from this software without specific prior written permission.
19  *
20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 /* Based on
34  *
35       SUBROUTINE DORMQR( SIDE, TRANS, M, N, K, A, LDA, TAU, C, LDC,
36      $                   WORK, LWORK, INFO )
37  *
38  *  -- LAPACK routine (version 3.3.1) --
39  *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
40  *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
41  *  -- April 2011                                                      --
42  */
43 
44 #ifndef FLENS_LAPACK_QR_ORMQR_H
45 #define FLENS_LAPACK_QR_ORMQR_H 1
46 
47 #include <flens/matrixtypes/matrixtypes.h>
48 #include <flens/vectortypes/vectortypes.h>
49 
50 namespace flens { namespace lapack {
51 
52 //== ormqr =====================================================================
53 template <typename MA, typename MC>
54     typename GeMatrix<MC>::IndexType
55     ormqr_wsq(Side                  side,
56               Transpose             trans,
57               GeMatrix<MA>          &A,
58               GeMatrix<MC>          &C);
59 
60 template <typename MA, typename VTAU, typename MC, typename VWORK>
61     void
62     ormqr(Side                      side,
63           Transpose                 trans,
64           GeMatrix<MA>              &A,
65           const DenseVector<VTAU>   &tau,
66           GeMatrix<MC>              &C,
67           DenseVector<VWORK>        &work);
68 
69 //-- forwarding ----------------------------------------------------------------
70 template <typename MA, typename MC>
71       typename MC::IndexType
72       ormqr_wsq(Side                side,
73                 Transpose           trans,
74                 MA                  &&A,
75                 MC                  &&C);
76 
77 template <typename MA, typename VTAU, typename MC, typename VWORK>
78       void
79       ormqr(Side                    side,
80             Transpose               trans,
81             MA                      &&A,
82             const VTAU              &tau,
83             MC                      &&C,
84             VWORK                   &&work);
85 
86 } } // namespace lapack, flens
87 
88 #endif // FLENS_LAPACK_QR_ORMQR_H