LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zstein_work()

lapack_int LAPACKE_zstein_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,
lapack_complex_double z,
lapack_int  ldz,
double *  work,
lapack_int iwork,
lapack_int ifailv 
)

Definition at line 36 of file lapacke_zstein_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_zstein( &n, d, e, &m, w, iblock, isplit, z, &ldz, work, iwork,
48  ifailv, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int ldz_t = MAX(1,n);
54  lapack_complex_double* z_t = NULL;
55  /* Check leading dimension(s) */
56  if( ldz < m ) {
57  info = -10;
58  LAPACKE_xerbla( "LAPACKE_zstein_work", info );
59  return info;
60  }
61  /* Allocate memory for temporary array(s) */
62  z_t = (lapack_complex_double*)
63  LAPACKE_malloc( sizeof(lapack_complex_double) * ldz_t * MAX(1,m) );
64  if( z_t == NULL ) {
66  goto exit_level_0;
67  }
68  /* Call LAPACK function and adjust info */
69  LAPACK_zstein( &n, d, e, &m, w, iblock, isplit, z_t, &ldz_t, work,
70  iwork, ifailv, &info );
71  if( info < 0 ) {
72  info = info - 1;
73  }
74  /* Transpose output matrices */
75  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, m, z_t, ldz_t, z, ldz );
76  /* Release memory and exit */
77  LAPACKE_free( z_t );
78 exit_level_0:
79  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
80  LAPACKE_xerbla( "LAPACKE_zstein_work", info );
81  }
82  } else {
83  info = -1;
84  LAPACKE_xerbla( "LAPACKE_zstein_work", info );
85  }
86  return info;
87 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_zstein(lapack_int *n, const double *d, const double *e, lapack_int *m, const double *w, const lapack_int *iblock, const lapack_int *isplit, lapack_complex_double *z, lapack_int *ldz, double *work, lapack_int *iwork, lapack_int *ifailv, lapack_int *info)
#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
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
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