LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstein()

lapack_int LAPACKE_dstein ( int  matrix_layout,
lapack_int  n,
const double *  d,
const double *  e,
lapack_int  m,
const double *  w,
const lapack_int iblock,
const lapack_int isplit,
double *  z,
lapack_int  ldz,
lapack_int ifailv 
)

Definition at line 36 of file lapacke_dstein.c.

40 {
41  lapack_int info = 0;
42  lapack_int* iwork = NULL;
43  double* work = NULL;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_dstein", -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_d_nancheck( n, d, 1 ) ) {
52  return -3;
53  }
54  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
55  return -4;
56  }
57  if( LAPACKE_d_nancheck( n, w, 1 ) ) {
58  return -6;
59  }
60  }
61 #endif
62  /* Allocate memory for working array(s) */
63  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
64  if( iwork == NULL ) {
66  goto exit_level_0;
67  }
68  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,5*n) );
69  if( work == NULL ) {
71  goto exit_level_1;
72  }
73  /* Call middle-level interface */
74  info = LAPACKE_dstein_work( matrix_layout, n, d, e, m, w, iblock, isplit, z,
75  ldz, work, iwork, ifailv );
76  /* Release memory and exit */
77  LAPACKE_free( work );
78 exit_level_1:
79  LAPACKE_free( iwork );
80 exit_level_0:
81  if( info == LAPACK_WORK_MEMORY_ERROR ) {
82  LAPACKE_xerbla( "LAPACKE_dstein", info );
83  }
84  return info;
85 }
#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
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#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_int LAPACKE_dstein_work(int matrix_layout, lapack_int n, const double *d, const double *e, lapack_int m, const double *w, const lapack_int *iblock, const lapack_int *isplit, double *z, lapack_int ldz, double *work, lapack_int *iwork, lapack_int *ifailv)
int LAPACKE_get_nancheck()
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