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/*
 * Copyright (C) 2014, The University of Texas at Austin
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - 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.
 *  - Neither the name of The University of Texas at Austin 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
 * HOLDER 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.
 *
 */

/*
 * Copyright (C) 2014-2015, Michael Lehn
 *
 * ulmBLAS adopted general ideas from BLIS.  Using micro kernels from BLIS
 * only requires minor modifications,
 *
 */

#ifndef ULMBLAS_IMPL_LEVEL2_HELR_TCC
#define ULMBLAS_IMPL_LEVEL2_HELR_TCC 1

#include <ulmblas/impl/auxiliary/conjugate.h>
#include <ulmblas/impl/auxiliary/real.h>
#include <ulmblas/impl/level2/helr.h>

namespace ulmBLAS {

template <typename IndexType, typename Alpha, typename TX, typename TA>
void
helr(IndexType    n,
     const Alpha  &alpha,
     bool         conjX,
     const TX     *x,
     IndexType    incX,
     TA           *A,
     IndexType    incRowA,
     IndexType    incColA)
{
//
//  Simple reference implementation
//
    if (n==0 || alpha==Alpha(0)) {
        return;
    }

    if (!conjX) {
        for (IndexType j=0; j<n; ++j) {
            for (IndexType i=j; i<n; ++i) {
                A[i*incRowA+j*incColA] += alpha*x[i*incX]*conjugate(x[j*incX]);
            }
        }
    } else {
        for (IndexType j=0; j<n; ++j) {
            for (IndexType i=j; i<n; ++i) {
                A[i*incRowA+j*incColA] += alpha*conjugate(x[i*incX])*x[j*incX];
            }
        }
    }

    for (IndexType i=0; i<n; ++i) {
        A[i*(incRowA+incColA)] = real(A[i*(incRowA+incColA)]);
    }
}

} // namespace ulmBLAS

#endif // ULMBLAS_IMPL_LEVEL2_HELR_TCC





































































































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