LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbev_2stage()

lapack_int LAPACKE_dsbev_2stage ( 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_dsbev_2stage.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  double* work = NULL;
43  double work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_dsbev_2stage", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  if( LAPACKE_get_nancheck() ) {
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
52  return -6;
53  }
54  }
55 #endif
56  /* Query optimal working array(s) size */
57  info = LAPACKE_dsbev_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
58  ldz, &work_query, lwork );
59  if( info != 0 ) {
60  goto exit_level_0;
61  }
62  lwork = (lapack_int)work_query;
63  /* Allocate memory for working array(s) */
64  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
65  if( work == NULL ) {
67  goto exit_level_0;
68  }
69  /* Call middle-level interface */
70  info = LAPACKE_dsbev_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
71  ldz, work, lwork );
72  /* Release memory and exit */
73  LAPACKE_free( work );
74 exit_level_0:
75  if( info == LAPACK_WORK_MEMORY_ERROR ) {
76  LAPACKE_xerbla( "LAPACKE_dsbev_2stage", info );
77  }
78  return info;
79 }
#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_dsbev_2stage_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)
#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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