LAPACK  3.10.1
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 35 of file lapacke_dstein.c.

39 {
40  lapack_int info = 0;
41  lapack_int* iwork = NULL;
42  double* work = NULL;
43  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
44  LAPACKE_xerbla( "LAPACKE_dstein", -1 );
45  return -1;
46  }
47 #ifndef LAPACK_DISABLE_NAN_CHECK
48  if( LAPACKE_get_nancheck() ) {
49  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
51  return -3;
52  }
53  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
54  return -4;
55  }
56  if( LAPACKE_d_nancheck( n, w, 1 ) ) {
57  return -6;
58  }
59  }
60 #endif
61  /* Allocate memory for working array(s) */
62  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
63  if( iwork == NULL ) {
65  goto exit_level_0;
66  }
67  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,5*n) );
68  if( work == NULL ) {
70  goto exit_level_1;
71  }
72  /* Call middle-level interface */
73  info = LAPACKE_dstein_work( matrix_layout, n, d, e, m, w, iblock, isplit, z,
74  ldz, work, iwork, ifailv );
75  /* Release memory and exit */
76  LAPACKE_free( work );
77 exit_level_1:
78  LAPACKE_free( iwork );
79 exit_level_0:
80  if( info == LAPACK_WORK_MEMORY_ERROR ) {
81  LAPACKE_xerbla( "LAPACKE_dstein", info );
82  }
83  return info;
84 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
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)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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