PartialPivLU_LAPACKE.h
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27  ********************************************************************************
28  * Content : Eigen bindings to LAPACKe
29  * LU decomposition with partial pivoting based on LAPACKE_?getrf function.
30  ********************************************************************************
31 */
32 
33 #ifndef EIGEN_PARTIALLU_LAPACK_H
34 #define EIGEN_PARTIALLU_LAPACK_H
35 
36 namespace Eigen {
37 
38 namespace internal {
39 
42 #define EIGEN_LAPACKE_LU_PARTPIV(EIGTYPE, LAPACKE_TYPE, LAPACKE_PREFIX) \
43 template<int StorageOrder> \
44 struct partial_lu_impl<EIGTYPE, StorageOrder, lapack_int> \
45 { \
46  /* \internal performs the LU decomposition in-place of the matrix represented */ \
47  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) \
48  { \
49  EIGEN_UNUSED_VARIABLE(maxBlockSize);\
50  lapack_int matrix_order, first_zero_pivot; \
51  lapack_int m, n, lda, *ipiv, info; \
52  EIGTYPE* a; \
53 /* Set up parameters for ?getrf */ \
54  matrix_order = StorageOrder==RowMajor ? LAPACK_ROW_MAJOR : LAPACK_COL_MAJOR; \
55  lda = convert_index<lapack_int>(luStride); \
56  a = lu_data; \
57  ipiv = row_transpositions; \
58  m = convert_index<lapack_int>(rows); \
59  n = convert_index<lapack_int>(cols); \
60  nb_transpositions = 0; \
61 \
62  info = LAPACKE_##LAPACKE_PREFIX##getrf( matrix_order, m, n, (LAPACKE_TYPE*)a, lda, ipiv ); \
63 \
64  for(int i=0;i<m;i++) { ipiv[i]--; if (ipiv[i]!=i) nb_transpositions++; } \
65 \
66  eigen_assert(info >= 0); \
67 /* something should be done with nb_transpositions */ \
68 \
69  first_zero_pivot = info; \
70  return first_zero_pivot; \
71  } \
72 };
73 
74 EIGEN_LAPACKE_LU_PARTPIV(double, double, d)
75 EIGEN_LAPACKE_LU_PARTPIV(float, float, s)
78 
79 } // end namespace internal
80 
81 } // end namespace Eigen
82 
83 #endif // EIGEN_PARTIALLU_LAPACK_H
#define lapack_complex_float
Definition: lapacke.h:76
#define EIGEN_LAPACKE_LU_PARTPIV(EIGTYPE, LAPACKE_TYPE, LAPACKE_PREFIX)
Scalar Scalar * c
Definition: benchVecAdd.cpp:17
Namespace containing all symbols from the Eigen library.
Definition: jet.h:637
std::complex< float > scomplex
Definition: MKL_support.h:126
std::complex< double > dcomplex
Definition: MKL_support.h:125
RealScalar s
#define lapack_complex_double
Definition: lapacke.h:92


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autogenerated on Tue Jul 4 2023 02:35:12