LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstein_work()

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 
)

Definition at line 36 of file lapacke_dstein_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dstein( &n, d, e, &m, w, iblock, isplit, z, &ldz, work, iwork,
47  ifailv, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldz_t = MAX(1,n);
53  double* z_t = NULL;
54  /* Check leading dimension(s) */
55  if( ldz < m ) {
56  info = -10;
57  LAPACKE_xerbla( "LAPACKE_dstein_work", info );
58  return info;
59  }
60  /* Allocate memory for temporary array(s) */
61  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,m) );
62  if( z_t == NULL ) {
64  goto exit_level_0;
65  }
66  /* Call LAPACK function and adjust info */
67  LAPACK_dstein( &n, d, e, &m, w, iblock, isplit, z_t, &ldz_t, work,
68  iwork, ifailv, &info );
69  if( info < 0 ) {
70  info = info - 1;
71  }
72  /* Transpose output matrices */
73  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, m, z_t, ldz_t, z, ldz );
74  /* Release memory and exit */
75  LAPACKE_free( z_t );
76 exit_level_0:
77  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
78  LAPACKE_xerbla( "LAPACKE_dstein_work", info );
79  }
80  } else {
81  info = -1;
82  LAPACKE_xerbla( "LAPACKE_dstein_work", info );
83  }
84  return info;
85 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACK_dstein(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, lapack_int *info)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#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
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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