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+/*
+ Copyright (c) 2011, Intel Corporation. All rights reserved.
+
+ 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 Intel Corporation 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 OWNER 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.
+
+ ********************************************************************************
+ * Content : Eigen bindings to Intel(R) MKL
+ * Singular Value Decomposition - SVD.
+ ********************************************************************************
+*/
+
+#ifndef EIGEN_JACOBISVD_MKL_H
+#define EIGEN_JACOBISVD_MKL_H
+
+#include "Eigen/src/Core/util/MKL_support.h"
+
+namespace Eigen {
+
+/** \internal Specialization for the data types supported by MKL */
+
+#define EIGEN_MKL_SVD(EIGTYPE, MKLTYPE, MKLRTYPE, MKLPREFIX, EIGCOLROW, MKLCOLROW) \
+template<> inline \
+JacobiSVD<Matrix<EIGTYPE, Dynamic, Dynamic, EIGCOLROW, Dynamic, Dynamic>, ColPivHouseholderQRPreconditioner>& \
+JacobiSVD<Matrix<EIGTYPE, Dynamic, Dynamic, EIGCOLROW, Dynamic, Dynamic>, ColPivHouseholderQRPreconditioner>::compute(const Matrix<EIGTYPE, Dynamic, Dynamic, EIGCOLROW, Dynamic, Dynamic>& matrix, unsigned int computationOptions) \
+{ \
+ typedef Matrix<EIGTYPE, Dynamic, Dynamic, EIGCOLROW, Dynamic, Dynamic> MatrixType; \
+ /*typedef MatrixType::Scalar Scalar;*/ \
+ /*typedef MatrixType::RealScalar RealScalar;*/ \
+ allocate(matrix.rows(), matrix.cols(), computationOptions); \
+\
+ /*const RealScalar precision = RealScalar(2) * NumTraits<Scalar>::epsilon();*/ \
+ m_nonzeroSingularValues = m_diagSize; \
+\
+ lapack_int lda = matrix.outerStride(), ldu, ldvt; \
+ lapack_int matrix_order = MKLCOLROW; \
+ char jobu, jobvt; \
+ MKLTYPE *u, *vt, dummy; \
+ jobu = (m_computeFullU) ? 'A' : (m_computeThinU) ? 'S' : 'N'; \
+ jobvt = (m_computeFullV) ? 'A' : (m_computeThinV) ? 'S' : 'N'; \
+ if (computeU()) { \
+ ldu = m_matrixU.outerStride(); \
+ u = (MKLTYPE*)m_matrixU.data(); \
+ } else { ldu=1; u=&dummy; }\
+ MatrixType localV; \
+ ldvt = (m_computeFullV) ? m_cols : (m_computeThinV) ? m_diagSize : 1; \
+ if (computeV()) { \
+ localV.resize(ldvt, m_cols); \
+ vt = (MKLTYPE*)localV.data(); \
+ } else { ldvt=1; vt=&dummy; }\
+ Matrix<MKLRTYPE, Dynamic, Dynamic> superb; superb.resize(m_diagSize, 1); \
+ MatrixType m_temp; m_temp = matrix; \
+ LAPACKE_##MKLPREFIX##gesvd( matrix_order, jobu, jobvt, m_rows, m_cols, (MKLTYPE*)m_temp.data(), lda, (MKLRTYPE*)m_singularValues.data(), u, ldu, vt, ldvt, superb.data()); \
+ if (computeV()) m_matrixV = localV.adjoint(); \
+ /* for(int i=0;i<m_diagSize;i++) if (m_singularValues.coeffRef(i) < precision) { m_nonzeroSingularValues--; m_singularValues.coeffRef(i)=RealScalar(0);}*/ \
+ m_isInitialized = true; \
+ return *this; \
+}
+
+EIGEN_MKL_SVD(double, double, double, d, ColMajor, LAPACK_COL_MAJOR)
+EIGEN_MKL_SVD(float, float, float , s, ColMajor, LAPACK_COL_MAJOR)
+EIGEN_MKL_SVD(dcomplex, MKL_Complex16, double, z, ColMajor, LAPACK_COL_MAJOR)
+EIGEN_MKL_SVD(scomplex, MKL_Complex8, float , c, ColMajor, LAPACK_COL_MAJOR)
+
+EIGEN_MKL_SVD(double, double, double, d, RowMajor, LAPACK_ROW_MAJOR)
+EIGEN_MKL_SVD(float, float, float , s, RowMajor, LAPACK_ROW_MAJOR)
+EIGEN_MKL_SVD(dcomplex, MKL_Complex16, double, z, RowMajor, LAPACK_ROW_MAJOR)
+EIGEN_MKL_SVD(scomplex, MKL_Complex8, float , c, RowMajor, LAPACK_ROW_MAJOR)
+
+} // end namespace Eigen
+
+#endif // EIGEN_JACOBISVD_MKL_H