SelfadjointMatrixVector_BLAS.h
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27  ********************************************************************************
28  * Content : Eigen bindings to BLAS F77
29  * Selfadjoint matrix-vector product functionality based on ?SYMV/HEMV.
30  ********************************************************************************
31 */
32 
33 #ifndef EIGEN_SELFADJOINT_MATRIX_VECTOR_BLAS_H
34 #define EIGEN_SELFADJOINT_MATRIX_VECTOR_BLAS_H
35 
36 namespace Eigen {
37 
38 namespace internal {
39 
40 /**********************************************************************
41 * This file implements selfadjoint matrix-vector multiplication using BLAS
42 **********************************************************************/
43 
44 // symv/hemv specialization
45 
46 template<typename Scalar, typename Index, int StorageOrder, int UpLo, bool ConjugateLhs, bool ConjugateRhs>
48  selfadjoint_matrix_vector_product<Scalar,Index,StorageOrder,UpLo,ConjugateLhs,ConjugateRhs,BuiltIn> {};
49 
50 #define EIGEN_BLAS_SYMV_SPECIALIZE(Scalar) \
51 template<typename Index, int StorageOrder, int UpLo, bool ConjugateLhs, bool ConjugateRhs> \
52 struct selfadjoint_matrix_vector_product<Scalar,Index,StorageOrder,UpLo,ConjugateLhs,ConjugateRhs,Specialized> { \
53 static void run( \
54  Index size, const Scalar* lhs, Index lhsStride, \
55  const Scalar* _rhs, Scalar* res, Scalar alpha) { \
56  enum {\
57  IsColMajor = StorageOrder==ColMajor \
58  }; \
59  if (IsColMajor == ConjugateLhs) {\
60  selfadjoint_matrix_vector_product<Scalar,Index,StorageOrder,UpLo,ConjugateLhs,ConjugateRhs,BuiltIn>::run( \
61  size, lhs, lhsStride, _rhs, res, alpha); \
62  } else {\
63  selfadjoint_matrix_vector_product_symv<Scalar,Index,StorageOrder,UpLo,ConjugateLhs,ConjugateRhs>::run( \
64  size, lhs, lhsStride, _rhs, res, alpha); \
65  }\
66  } \
67 }; \
68 
73 
74 #define EIGEN_BLAS_SYMV_SPECIALIZATION(EIGTYPE,BLASTYPE,BLASFUNC) \
75 template<typename Index, int StorageOrder, int UpLo, bool ConjugateLhs, bool ConjugateRhs> \
76 struct selfadjoint_matrix_vector_product_symv<EIGTYPE,Index,StorageOrder,UpLo,ConjugateLhs,ConjugateRhs> \
77 { \
78 typedef Matrix<EIGTYPE,Dynamic,1,ColMajor> SYMVVector;\
79 \
80 static void run( \
81 Index size, const EIGTYPE* lhs, Index lhsStride, \
82 const EIGTYPE* _rhs, EIGTYPE* res, EIGTYPE alpha) \
83 { \
84  enum {\
85  IsRowMajor = StorageOrder==RowMajor ? 1 : 0, \
86  IsLower = UpLo == Lower ? 1 : 0 \
87  }; \
88  BlasIndex n=convert_index<BlasIndex>(size), lda=convert_index<BlasIndex>(lhsStride), incx=1, incy=1; \
89  EIGTYPE beta(1); \
90  const EIGTYPE *x_ptr; \
91  char uplo=(IsRowMajor) ? (IsLower ? 'U' : 'L') : (IsLower ? 'L' : 'U'); \
92  SYMVVector x_tmp; \
93  if (ConjugateRhs) { \
94  Map<const SYMVVector, 0 > map_x(_rhs,size,1); \
95  x_tmp=map_x.conjugate(); \
96  x_ptr=x_tmp.data(); \
97  } else x_ptr=_rhs; \
98  BLASFUNC(&uplo, &n, (const BLASTYPE*)&numext::real_ref(alpha), (const BLASTYPE*)lhs, &lda, (const BLASTYPE*)x_ptr, &incx, (const BLASTYPE*)&numext::real_ref(beta), (BLASTYPE*)res, &incy); \
99 }\
100 };
101 
102 #ifdef EIGEN_USE_MKL
103 EIGEN_BLAS_SYMV_SPECIALIZATION(double, double, dsymv)
107 #else
108 EIGEN_BLAS_SYMV_SPECIALIZATION(double, double, dsymv_)
109 EIGEN_BLAS_SYMV_SPECIALIZATION(float, float, ssymv_)
112 #endif
113 
114 } // end namespace internal
115 
116 } // end namespace Eigen
117 
118 #endif // EIGEN_SELFADJOINT_MATRIX_VECTOR_BLAS_H
int BLASFUNC() ssymv(char *, int *, float *, float *, int *, float *, int *, float *, float *, int *)
#define EIGEN_BLAS_SYMV_SPECIALIZATION(EIGTYPE, BLASTYPE, BLASFUNC)
int BLASFUNC() chemv(char *, int *, float *, float *, int *, float *, int *, float *, float *, int *)
Namespace containing all symbols from the Eigen library.
Definition: jet.h:637
#define EIGEN_BLAS_SYMV_SPECIALIZE(Scalar)
int BLASFUNC() zhemv(char *, int *, double *, double *, int *, double *, int *, double *, double *, int *)
std::complex< float > scomplex
Definition: MKL_support.h:126
std::complex< double > dcomplex
Definition: MKL_support.h:125
int BLASFUNC() dsymv(char *, int *, double *, double *, int *, double *, int *, double *, double *, int *)


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autogenerated on Tue Jul 4 2023 02:35:37