LAPACK  3.10.0
LAPACK: Linear Algebra PACKage
lapacke_dsyevr_work.c
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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function dsyevr
30 * Author: Intel Corporation
31 *****************************************************************************/
32 
33 #include "lapacke_utils.h"
34 
35 lapack_int LAPACKE_dsyevr_work( int matrix_layout, char jobz, char range,
36  char uplo, lapack_int n, double* a,
37  lapack_int lda, double vl, double vu,
38  lapack_int il, lapack_int iu, double abstol,
39  lapack_int* m, double* w, double* z,
40  lapack_int ldz, lapack_int* isuppz,
41  double* work, lapack_int lwork,
42  lapack_int* iwork, lapack_int liwork )
43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_dsyevr( &jobz, &range, &uplo, &n, a, &lda, &vl, &vu, &il, &iu,
48  &abstol, m, w, z, &ldz, isuppz, work, &lwork, iwork,
49  &liwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int ncols_z = ( !LAPACKE_lsame( jobz, 'v' ) ) ? 1 :
55  ( LAPACKE_lsame( range, 'a' ) ||
56  LAPACKE_lsame( range, 'v' ) ) ? n :
57  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
58  lapack_int lda_t = MAX(1,n);
59  lapack_int ldz_t = MAX(1,n);
60  double* a_t = NULL;
61  double* z_t = NULL;
62  /* Check leading dimension(s) */
63  if( lda < n ) {
64  info = -7;
65  LAPACKE_xerbla( "LAPACKE_dsyevr_work", info );
66  return info;
67  }
68  if( ldz < ncols_z ) {
69  info = -16;
70  LAPACKE_xerbla( "LAPACKE_dsyevr_work", info );
71  return info;
72  }
73  /* Query optimal working array(s) size if requested */
74  if( liwork == -1 || lwork == -1 ) {
75  LAPACK_dsyevr( &jobz, &range, &uplo, &n, a, &lda_t, &vl, &vu, &il,
76  &iu, &abstol, m, w, z, &ldz_t, isuppz, work, &lwork,
77  iwork, &liwork, &info );
78  return (info < 0) ? (info - 1) : info;
79  }
80  /* Allocate memory for temporary array(s) */
81  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
82  if( a_t == NULL ) {
84  goto exit_level_0;
85  }
86  if( LAPACKE_lsame( jobz, 'v' ) ) {
87  z_t = (double*)
88  LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,ncols_z) );
89  if( z_t == NULL ) {
91  goto exit_level_1;
92  }
93  }
94  /* Transpose input matrices */
95  LAPACKE_dsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
96  /* Call LAPACK function and adjust info */
97  LAPACK_dsyevr( &jobz, &range, &uplo, &n, a_t, &lda_t, &vl, &vu, &il,
98  &iu, &abstol, m, w, z_t, &ldz_t, isuppz, work, &lwork,
99  iwork, &liwork, &info );
100  if( info < 0 ) {
101  info = info - 1;
102  }
103  /* Transpose output matrices */
104  LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
105  if( LAPACKE_lsame( jobz, 'v' ) ) {
106  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
107  ldz );
108  }
109  /* Release memory and exit */
110  if( LAPACKE_lsame( jobz, 'v' ) ) {
111  LAPACKE_free( z_t );
112  }
113 exit_level_1:
114  LAPACKE_free( a_t );
115 exit_level_0:
116  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
117  LAPACKE_xerbla( "LAPACKE_dsyevr_work", info );
118  }
119  } else {
120  info = -1;
121  LAPACKE_xerbla( "LAPACKE_dsyevr_work", info );
122  }
123  return info;
124 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dsyevr(...)
Definition: lapack.h:17173
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
lapack_int LAPACKE_dsyevr_work(int matrix_layout, char jobz, char range, char uplo, lapack_int n, double *a, lapack_int lda, double vl, double vu, lapack_int il, lapack_int iu, double abstol, lapack_int *m, double *w, double *z, lapack_int ldz, lapack_int *isuppz, double *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACKE_dsy_trans(int matrix_layout, char uplo, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)