LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbevd()

lapack_int LAPACKE_dsbevd ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
double *  ab,
lapack_int  ldab,
double *  w,
double *  z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_dsbevd.c.

39 {
40  lapack_int info = 0;
41  lapack_int liwork = -1;
42  lapack_int lwork = -1;
43  lapack_int* iwork = NULL;
44  double* work = NULL;
45  lapack_int iwork_query;
46  double work_query;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_dsbevd", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
55  return -6;
56  }
57  }
58 #endif
59  /* Query optimal working array(s) size */
60  info = LAPACKE_dsbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
61  ldz, &work_query, lwork, &iwork_query, liwork );
62  if( info != 0 ) {
63  goto exit_level_0;
64  }
65  liwork = (lapack_int)iwork_query;
66  lwork = (lapack_int)work_query;
67  /* Allocate memory for work arrays */
68  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
69  if( iwork == NULL ) {
71  goto exit_level_0;
72  }
73  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
74  if( work == NULL ) {
76  goto exit_level_1;
77  }
78  /* Call middle-level interface */
79  info = LAPACKE_dsbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
80  ldz, work, lwork, iwork, liwork );
81  /* Release memory and exit */
82  LAPACKE_free( work );
83 exit_level_1:
84  LAPACKE_free( iwork );
85 exit_level_0:
86  if( info == LAPACK_WORK_MEMORY_ERROR ) {
87  LAPACKE_xerbla( "LAPACKE_dsbevd", info );
88  }
89  return info;
90 }
#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_int LAPACKE_dsbevd_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_int kd, double *ab, lapack_int ldab, double *w, double *z, lapack_int ldz, 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
lapack_logical LAPACKE_dsb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *ab, lapack_int ldab)
int LAPACKE_get_nancheck()
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