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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_LEVEL3_MKERNEL_MTRUSM_TCC
#define ULMBLAS_IMPL_LEVEL3_MKERNEL_MTRUSM_TCC 1
#include <ulmblas/impl/level3/mkernel/mtrusm.h>
#include <ulmblas/impl/level3/ukernel/ugemm.h>
#include <ulmblas/impl/level3/ukernel/utrusm.h>
namespace ulmBLAS {
template <typename IndexType, typename T, typename TB>
void
mtrusm(IndexType mc,
IndexType nc,
const T &alpha,
const T *A_,
T *B_,
TB *B,
IndexType incRowB,
IndexType incColB)
{
const IndexType MR = BlockSizeUGemm<T>::MR;
const IndexType NR = BlockSizeUGemm<T>::NR;
const IndexType mp = (mc+MR-1) / MR;
const IndexType np = (nc+NR-1) / NR;
const IndexType mr_ = mc % MR;
const IndexType nr_ = nc % NR;
IndexType mr, nr;
IndexType kc;
const T *nextA;
const T *nextB;
const IndexType na = mp*(2*mc-(mp-1)*MR)/2;
for (IndexType j=0; j<np; ++j) {
nr = (j!=np-1 || nr_==0) ? NR : nr_;
nextB = &B_[j*mc*NR];
IndexType ia = na;
IndexType ib = mc;
for (IndexType i=mp-1; i>=0; --i) {
mr = (i!=mp-1 || mr_==0) ? MR : mr_;
kc = std::max(mc-(i+1)*MR, IndexType(0));
ia -= mr + kc;
ib -= mr;
nextA = &A_[(ia-1)*MR];
if (i==0) {
nextA = A_;
nextB = &B_[(j+1)*mc*NR];
if (j==np-1) {
nextB = B_;
}
}
if (mr==MR && nr==NR) {
ugemm(kc,
T(-1), &A_[(ia+MR)*MR], &B_[(j*mc+ib+MR)*NR],
alpha,
&B_[(j*mc+ib)*NR], NR, IndexType(1),
nextA, nextB);
utrusm(&A_[ia*MR], &B_[(j*mc+ib)*NR],
&B_[(j*mc+ib)*NR], NR, IndexType(1));
} else {
// Call buffered micro kernels
ugemm(mr, nr, kc,
T(-1), &A_[(ia+MR)*MR], &B_[(j*mc+ib+mr)*NR],
alpha,
&B_[(j*mc+ib)*NR], NR, IndexType(1),
nextA, nextB);
utrusm(mr, nr,
&A_[ia*MR], &B_[(j*mc+ib)*NR],
&B_[(j*mc+ib)*NR], NR, IndexType(1));
}
}
}
for (IndexType j=0; j<np; ++j) {
nr = (j!=np-1 || nr_==0) ? NR : nr_;
gecopy(mc, nr,
&B_[j*mc*NR], NR, IndexType(1),
&B[j*NR*incColB], incRowB, incColB);
}
}
} // namespace ulmBLAS
#endif // ULMBLAS_IMPL_LEVEL3_MKERNEL_MTRUSM_TCC
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