tbmm.tcc (cxxblas/level3extensions/tbmm.tcc)

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/*
*   Copyright (c) 2012, Klaus Pototzky
*
*   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.
*/

#ifndef CXXBLAS_LEVEL3EXTENSION_TBMM_TCC
#define CXXBLAS_LEVEL3EXTENSION_TBMM_TCC 1

#include <complex>
#include <cxxblas/cxxblas.h>

namespace cxxblas {

template <typename IndexType, typename ALPHA, typename MA, typename MB>
void
tbmm(StorageOrder order, Side sideA, StorageUpLo upLo,
      Transpose transA, Diag diag,
      IndexType m, IndexType n,
      IndexType k,
      const ALPHA &alpha,
      const MA *A, IndexType ldA,
      MB *B, IndexType ldB)
{
    if (order==RowMajor) {
        if (sideA==Left) {
            for (IndexType i=0; i<n; ++i) {
                 tbmv(RowMajor, upLo, transA, diag, m, k,
                      A, ldA, B+i, ldB);
                 scal(m, alpha, B+i, ldB);
            }
        } else if (sideA==Right) {
            transA = Transpose(transA^Trans);
            for (IndexType i=0; i<m; ++i) {
                tbmv(RowMajor, upLo, transA, diag, n, k,
                     A, ldA, B+i*ldB, IndexType(1));
                scal(n, alpha, B+i*ldB, ldB);
            }

        }
    } else {
        if (sideA==Left) {
            transA = Transpose(transA^Trans);
            for (IndexType i=0; i<n; ++i) {
                tbmv(ColMajor, upLo, transA, diag, m, k,
                     A, ldA, B+i*ldB, IndexType(1));
                scal(m, alpha, B+i*ldB, ldB);
            }
        } else if (sideA==Right) {
            transA = Transpose(transA^Trans);
            for (IndexType i=0; i<m; ++i) {
                tbmv(ColMajor, upLo, transA, diag, n, k,
                     A, ldA, B+i, ldB);
                scal(n, alpha, B+i, ldB);
            }
        }
    }
    return;
}

} // namespace cxxblas

#endif // CXXBLAS_LEVEL3EXTENSION_TBMM_TCC