LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstevd()

lapack_int LAPACKE_dstevd ( int  matrix_layout,
char  jobz,
lapack_int  n,
double *  d,
double *  e,
double *  z,
lapack_int  ldz 
)

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