LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstedc()

lapack_int LAPACKE_dstedc ( int  matrix_layout,
char  compz,
lapack_int  n,
double *  d,
double *  e,
double *  z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_dstedc.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_dstedc", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
53  return -4;
54  }
55  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
56  return -5;
57  }
58  if( LAPACKE_lsame( compz, 'v' ) ) {
59  if( LAPACKE_dge_nancheck( matrix_layout, n, n, z, ldz ) ) {
60  return -6;
61  }
62  }
63 #endif
64  /* Query optimal working array(s) size */
65  info = LAPACKE_dstedc_work( matrix_layout, compz, n, d, e, z, ldz,
66  &work_query, lwork, &iwork_query, liwork );
67  if( info != 0 ) {
68  goto exit_level_0;
69  }
70  liwork = (lapack_int)iwork_query;
71  lwork = (lapack_int)work_query;
72  /* Allocate memory for work arrays */
73  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
74  if( iwork == NULL ) {
76  goto exit_level_0;
77  }
78  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
79  if( work == NULL ) {
81  goto exit_level_1;
82  }
83  /* Call middle-level interface */
84  info = LAPACKE_dstedc_work( matrix_layout, compz, n, d, e, z, ldz, work,
85  lwork, iwork, liwork );
86  /* Release memory and exit */
87  LAPACKE_free( work );
88 exit_level_1:
89  LAPACKE_free( iwork );
90 exit_level_0:
91  if( info == LAPACK_WORK_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_dstedc", info );
93  }
94  return info;
95 }
#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)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
lapack_int LAPACKE_dstedc_work(int matrix_layout, char compz, lapack_int n, double *d, double *e, double *z, lapack_int ldz, double *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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