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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 LAPACKe
- * LU decomposition with partial pivoting based on LAPACKE_?getrf function.
- ********************************************************************************
- */
- #ifndef EIGEN_PARTIALLU_LAPACK_H
- #define EIGEN_PARTIALLU_LAPACK_H
- namespace Eigen {
- namespace internal {
- /** \internal Specialization for the data types supported by LAPACKe */
- #define EIGEN_LAPACKE_LU_PARTPIV(EIGTYPE, LAPACKE_TYPE, LAPACKE_PREFIX) \
- template<int StorageOrder> \
- struct partial_lu_impl<EIGTYPE, StorageOrder, lapack_int> \
- { \
- /* \internal performs the LU decomposition in-place of the matrix represented */ \
- static lapack_int blocked_lu(Index rows, Index cols, EIGTYPE* lu_data, Index luStride, lapack_int* row_transpositions, lapack_int& nb_transpositions, lapack_int maxBlockSize=256) \
- { \
- EIGEN_UNUSED_VARIABLE(maxBlockSize);\
- lapack_int matrix_order, first_zero_pivot; \
- lapack_int m, n, lda, *ipiv, info; \
- EIGTYPE* a; \
- /* Set up parameters for ?getrf */ \
- matrix_order = StorageOrder==RowMajor ? LAPACK_ROW_MAJOR : LAPACK_COL_MAJOR; \
- lda = convert_index<lapack_int>(luStride); \
- a = lu_data; \
- ipiv = row_transpositions; \
- m = convert_index<lapack_int>(rows); \
- n = convert_index<lapack_int>(cols); \
- nb_transpositions = 0; \
- \
- info = LAPACKE_##LAPACKE_PREFIX##getrf( matrix_order, m, n, (LAPACKE_TYPE*)a, lda, ipiv ); \
- \
- for(int i=0;i<m;i++) { ipiv[i]--; if (ipiv[i]!=i) nb_transpositions++; } \
- \
- eigen_assert(info >= 0); \
- /* something should be done with nb_transpositions */ \
- \
- first_zero_pivot = info; \
- return first_zero_pivot; \
- } \
- };
- EIGEN_LAPACKE_LU_PARTPIV(double, double, d)
- EIGEN_LAPACKE_LU_PARTPIV(float, float, s)
- EIGEN_LAPACKE_LU_PARTPIV(dcomplex, lapack_complex_double, z)
- EIGEN_LAPACKE_LU_PARTPIV(scomplex, lapack_complex_float, c)
- } // end namespace internal
- } // end namespace Eigen
- #endif // EIGEN_PARTIALLU_LAPACK_H
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