herk.tcc (cxxblas/level3/herk.tcc)

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/*
*   Copyright (c) 2009, 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.
*/

#ifndef CXXBLAS_LEVEL3_HERK_TCC
#define CXXBLAS_LEVEL3_HERK_TCC 1

#include <cxxblas/cxxblas.h>

namespace cxxblas {

template <typename IndexType, typename ALPHA, typename MA,
          typename BETA, typename MC>
void
herk_generic(StorageOrder order, StorageUpLo upLoC,
             Transpose transA, IndexType n, IndexType k,
             const ALPHA &alpha, const MA *A, IndexType ldA,
             const BETA &beta, MC *C, IndexType ldC)
{
    if (order==ColMajor) {
        upLoC = (upLoC==Upper) ? Lower : Upper;
        transA = Transpose(transA^ConjTrans);
        herk_generic(RowMajor, upLoC, transA, n, k,
                     alpha, A, ldA, beta, C, ldC);
        return;
    }
    if ((n==0) || (((alpha==ALPHA(0)) || (k==0)) && (beta==BETA(1)))) {
        return;
    }
    hescal(order, upLoC, n, beta, C, ldC);
    if (alpha==ALPHA(0)) {
        return;
    }
    if (transA==NoTrans) {
        for (IndexType l=0; l<k; ++l) {
            her(order,  upLoC, n, alpha, A+l, ldA, C, ldC);
        }
    }
    if (transA==Conj) {
        assert(0);
    }
    if (transA==Trans) {
        assert(0);
    }
    if (transA==ConjTrans) {
        for (IndexType l=0; l<k; ++l) {
            her(order,  upLoC, Conj, n, alpha, A+l*ldA, IndexType(1), C, ldC);
        }
    }
}

template <typename IndexType, typename ALPHA, typename MA,
          typename BETA, typename MC>
void
herk(StorageOrder order, StorageUpLo upLo,
     Transpose trans, IndexType n, IndexType k,
     const ALPHA &alpha,
     const MA *A, IndexType ldA,
     const BETA &beta,
     MC *C, IndexType ldC)
{
    CXXBLAS_DEBUG_OUT("herk_generic");

    herk_generic(order, upLo, trans, n, k, alpha, A, ldA, beta, C, ldC);
}

#ifdef HAVE_CBLAS

// cherk
template <typename IndexType>
typename If<IndexType>::isBlasCompatibleInteger
herk(StorageOrder order, StorageUpLo upLo,
     Transpose trans, IndexType n, IndexType k,
     float alpha,
     const ComplexFloat *A, IndexType ldA,
     float beta,
     ComplexFloat *C, IndexType ldC)
{
    CXXBLAS_DEBUG_OUT("[" BLAS_IMPL "] cblas_cherk");

    cblas_cherk(CBLAS::getCblasType(order), CBLAS::getCblasType(upLo),
                CBLAS::getCblasType(trans), n, k,
                alpha,
                reinterpret_cast<const float *>(A), ldA,
                beta,
                reinterpret_cast<float *>(C), ldC);
}

// zherk
template <typename IndexType>
typename If<IndexType>::isBlasCompatibleInteger
herk(StorageOrder order, StorageUpLo upLo,
     Transpose trans, IndexType n, IndexType k,
     double alpha,
     const ComplexDouble *A, IndexType ldA,
     double beta,
     ComplexDouble *C, IndexType ldC)
{
    CXXBLAS_DEBUG_OUT("[" BLAS_IMPL "] cblas_zherk");

    cblas_zherk(CBLAS::getCblasType(order), CBLAS::getCblasType(upLo),
                CBLAS::getCblasType(trans), n, k,
                alpha,
                reinterpret_cast<const double *>(A), ldA,
                beta,
                reinterpret_cast<double *>(C), ldC);
}

#endif // HAVE_CBLAS

} // namespace cxxblas

#endif // CXXBLAS_LEVEL3_HERK_TCC