Eigen
3.3.0
GeneralMatrixMatrix_BLAS.h
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/*
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Copyright (c) 2011, Intel Corporation. All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its contributors may
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be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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********************************************************************************
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* Content : Eigen bindings to BLAS F77
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* General matrix-matrix product functionality based on ?GEMM.
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********************************************************************************
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*/
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#ifndef EIGEN_GENERAL_MATRIX_MATRIX_BLAS_H
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#define EIGEN_GENERAL_MATRIX_MATRIX_BLAS_H
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namespace
Eigen
{
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namespace
internal {
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/**********************************************************************
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* This file implements general matrix-matrix multiplication using BLAS
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* gemm function via partial specialization of
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* general_matrix_matrix_product::run(..) method for float, double,
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* std::complex<float> and std::complex<double> types
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**********************************************************************/
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// gemm specialization
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#define GEMM_SPECIALIZATION(EIGTYPE, EIGPREFIX, BLASTYPE, BLASPREFIX) \
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template< \
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typename Index, \
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int LhsStorageOrder, bool ConjugateLhs, \
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int RhsStorageOrder, bool ConjugateRhs> \
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struct general_matrix_matrix_product<Index,EIGTYPE,LhsStorageOrder,ConjugateLhs,EIGTYPE,RhsStorageOrder,ConjugateRhs,ColMajor> \
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{ \
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typedef gebp_traits<EIGTYPE,EIGTYPE> Traits; \
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\
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static void run(Index rows, Index cols, Index depth, \
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const EIGTYPE* _lhs, Index lhsStride, \
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const EIGTYPE* _rhs, Index rhsStride, \
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EIGTYPE* res, Index resStride, \
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EIGTYPE alpha, \
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level3_blocking<EIGTYPE, EIGTYPE>&
/*blocking*/
, \
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GemmParallelInfo<Index>*
/*info = 0*/
) \
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{ \
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using std::conj; \
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\
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char transa, transb; \
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BlasIndex m, n, k, lda, ldb, ldc; \
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const EIGTYPE *a, *b; \
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EIGTYPE beta(1); \
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MatrixX##EIGPREFIX a_tmp, b_tmp; \
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\
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/* Set transpose options */
\
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transa = (LhsStorageOrder==RowMajor) ? ((ConjugateLhs) ? 'C' : 'T') : 'N'; \
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transb = (RhsStorageOrder==RowMajor) ? ((ConjugateRhs) ? 'C' : 'T') : 'N'; \
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\
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/* Set m, n, k */
\
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m = convert_index<BlasIndex>(rows); \
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n = convert_index<BlasIndex>(cols); \
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k = convert_index<BlasIndex>(depth); \
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\
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/* Set lda, ldb, ldc */
\
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lda = convert_index<BlasIndex>(lhsStride); \
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ldb = convert_index<BlasIndex>(rhsStride); \
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ldc = convert_index<BlasIndex>(resStride); \
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\
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/* Set a, b, c */
\
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if ((LhsStorageOrder==ColMajor) && (ConjugateLhs)) { \
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Map<const MatrixX##EIGPREFIX, 0, OuterStride<> > lhs(_lhs,m,k,OuterStride<>(lhsStride)); \
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a_tmp = lhs.conjugate(); \
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a = a_tmp.data(); \
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lda = convert_index<BlasIndex>(a_tmp.outerStride()); \
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} else a = _lhs; \
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\
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if ((RhsStorageOrder==ColMajor) && (ConjugateRhs)) { \
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Map<const MatrixX##EIGPREFIX, 0, OuterStride<> > rhs(_rhs,k,n,OuterStride<>(rhsStride)); \
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b_tmp = rhs.conjugate(); \
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b = b_tmp.data(); \
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ldb = convert_index<BlasIndex>(b_tmp.outerStride()); \
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} else b = _rhs; \
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\
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BLASPREFIX##gemm_(&transa, &transb, &m, &n, &k, &numext::real_ref(alpha), (const BLASTYPE*)a, &lda, (const BLASTYPE*)b, &ldb, &numext::real_ref(beta), (BLASTYPE*)res, &ldc); \
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}};
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GEMM_SPECIALIZATION(
double
, d,
double
, d)
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GEMM_SPECIALIZATION(
float
, f,
float
, s)
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GEMM_SPECIALIZATION(dcomplex, cd,
double
, z)
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GEMM_SPECIALIZATION(scomplex, cf,
float
, c)
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}
// end namespase internal
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}
// end namespace Eigen
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#endif // EIGEN_GENERAL_MATRIX_MATRIX_BLAS_H
Eigen
Namespace containing all symbols from the Eigen library.
Definition:
Core:287
Eigen
src
Core
products
GeneralMatrixMatrix_BLAS.h
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