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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_HBUMV_TCC
#define ULMBLAS_IMPL_LEVEL2_HBUMV_TCC 1
#include <ulmblas/impl/auxiliary/real.h>
#include <ulmblas/impl/level1extensions/dotaxpy.h>
#include <ulmblas/impl/level1/scal.h>
#include <ulmblas/impl/level2/hbumv.h>
namespace ulmBLAS {
template <typename IndexType, typename Alpha, typename TA, typename TX,
typename Beta, typename TY>
void
hbumv(IndexType n,
IndexType k,
const Alpha &alpha,
bool conjA,
const TA *A,
IndexType ldA,
const TX *x,
IndexType incX,
const Beta &beta,
TY *y,
IndexType incY)
{
typedef decltype(Alpha(0)*TA(0)*TX(0)+Beta(0)*TY(0)) T;
if (n==0 || (alpha==Alpha(0) && beta==Beta(1))) {
return;
}
scal(n, beta, y, incY);
if (alpha==Alpha(0)) {
return;
}
for (IndexType j=0; j<n; ++j) {
IndexType i0 = std::max(IndexType(0), k-j);
IndexType i1 = k - std::max(IndexType(0), (j+1)-n);
IndexType len = std::max(IndexType(0), i1-i0+1);
IndexType i0XY = std::max(IndexType(0), j-k);
IndexType i1XY = i0XY + len - 1;
T rho;
dotaxpy(len-1, conjA, !conjA, false,
alpha*x[j*incX],
&A[i0], IndexType(1),
&x[i0XY*incX], incX,
&y[i0XY*incY], incY,
rho);
y[i1XY*incY] += alpha*(rho+real(A[i1])*x[i1XY*incX]);
A += ldA;
}
}
template <typename IndexType, typename Alpha, typename TA, typename TX,
typename Beta, typename TY>
void
hbumv(IndexType n,
IndexType k,
const Alpha &alpha,
const TA *A,
IndexType ldA,
const TX *x,
IndexType incX,
const Beta &beta,
TY *y,
IndexType incY)
{
hbumv(n, k, alpha, false, A, ldA, x, incX, beta, y, incY);
}
} // namespace ulmBLAS
#endif // ULMBLAS_IMPL_LEVEL2_HBUMV_TCC
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