LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsyevd()

lapack_int LAPACKE_dsyevd ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  w 
)

Definition at line 36 of file lapacke_dsyevd.c.

38 {
39  lapack_int info = 0;
40  lapack_int liwork = -1;
41  lapack_int lwork = -1;
42  lapack_int* iwork = NULL;
43  double* work = NULL;
44  lapack_int iwork_query;
45  double work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_dsyevd", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
54  return -5;
55  }
56  }
57 #endif
58  /* Query optimal working array(s) size */
59  info = LAPACKE_dsyevd_work( matrix_layout, jobz, uplo, n, a, lda, w,
60  &work_query, lwork, &iwork_query, liwork );
61  if( info != 0 ) {
62  goto exit_level_0;
63  }
64  liwork = (lapack_int)iwork_query;
65  lwork = (lapack_int)work_query;
66  /* Allocate memory for work arrays */
67  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
68  if( iwork == NULL ) {
70  goto exit_level_0;
71  }
72  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
73  if( work == NULL ) {
75  goto exit_level_1;
76  }
77  /* Call middle-level interface */
78  info = LAPACKE_dsyevd_work( matrix_layout, jobz, uplo, n, a, lda, w, work,
79  lwork, iwork, liwork );
80  /* Release memory and exit */
81  LAPACKE_free( work );
82 exit_level_1:
83  LAPACKE_free( iwork );
84 exit_level_0:
85  if( info == LAPACK_WORK_MEMORY_ERROR ) {
86  LAPACKE_xerbla( "LAPACKE_dsyevd", info );
87  }
88  return info;
89 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
lapack_int LAPACKE_dsyevd_work(int matrix_layout, char jobz, char uplo, lapack_int n, double *a, lapack_int lda, double *w, double *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
int LAPACKE_get_nancheck()
Here is the call graph for this function: