Home Browse Files
      1
      2
      3
      4
      5
      6
      7
      8
      9
     10
     11
     12
     13
     14
     15
     16
     17
     18
     19
     20
     21
     22
     23
     24
     25
     26
     27
     28
     29
     30
     31
     32
     33
     34
     35
     36
     37
     38
     39
     40
     41
     42
     43
     44
     45
     46
     47
     48
     49
     50
     51
     52
     53
     54
     55
     56
     57
     58
     59
     60
     61
     62
     63
     64
     65
     66
     67
     68
     69
     70
     71
     72
     73
     74
     75
     76
     77
     78
     79
     80
     81
     82
     83
     84
     85
     86
     87
     88
     89
     90
     91
/*
 * 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_SBLMV_TCC
#define ULMBLAS_IMPL_LEVEL2_SBLMV_TCC 1

#include <ulmblas/impl/level1extensions/dotaxpy.h>
#include <ulmblas/impl/level1/scal.h>
#include <ulmblas/impl/level2/sblmv.h>

namespace ulmBLAS {

template <typename IndexType, typename Alpha, typename TA, typename TX,
          typename Beta, typename TY>
void
sblmv(IndexType    n,
      IndexType    k,
      const Alpha  &alpha,
      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 i1  = k - std::max(IndexType(0), (j+1+k)-n);
        IndexType len = std::max(IndexType(0), i1+1);
        T         rho;

        dotaxpy(len-1, false, false, false,
                alpha*x[j*incX],
                &A[1], IndexType(1),
                &x[(j+1)*incX], incX,
                &y[(j+1)*incY], incY,
                rho);
        y[j*incY] += alpha*(rho+A[0]*x[j*incX]);
        A += ldA;
    }
}

} // namespace ulmBLAS

#endif // ULMBLAS_IMPL_LEVEL2_SBLMV_TCC





































































































Home