LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhbevd()

lapack_int LAPACKE_zhbevd ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
lapack_complex_double ab,
lapack_int  ldab,
double *  w,
lapack_complex_double z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_zhbevd.c.

40 {
41  lapack_int info = 0;
42  lapack_int liwork = -1;
43  lapack_int lrwork = -1;
44  lapack_int lwork = -1;
45  lapack_int* iwork = NULL;
46  double* rwork = NULL;
47  lapack_complex_double* work = NULL;
48  lapack_int iwork_query;
49  double rwork_query;
50  lapack_complex_double work_query;
51  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
52  LAPACKE_xerbla( "LAPACKE_zhbevd", -1 );
53  return -1;
54  }
55 #ifndef LAPACK_DISABLE_NAN_CHECK
56  if( LAPACKE_get_nancheck() ) {
57  /* Optionally check input matrices for NaNs */
58  if( LAPACKE_zhb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
59  return -6;
60  }
61  }
62 #endif
63  /* Query optimal working array(s) size */
64  info = LAPACKE_zhbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
65  ldz, &work_query, lwork, &rwork_query, lrwork,
66  &iwork_query, liwork );
67  if( info != 0 ) {
68  goto exit_level_0;
69  }
70  liwork = (lapack_int)iwork_query;
71  lrwork = (lapack_int)rwork_query;
72  lwork = LAPACK_Z2INT( work_query );
73  /* Allocate memory for work arrays */
74  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
75  if( iwork == NULL ) {
77  goto exit_level_0;
78  }
79  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
80  if( rwork == NULL ) {
82  goto exit_level_1;
83  }
84  work = (lapack_complex_double*)
85  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
86  if( work == NULL ) {
88  goto exit_level_2;
89  }
90  /* Call middle-level interface */
91  info = LAPACKE_zhbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
92  ldz, work, lwork, rwork, lrwork, iwork,
93  liwork );
94  /* Release memory and exit */
95  LAPACKE_free( work );
96 exit_level_2:
97  LAPACKE_free( rwork );
98 exit_level_1:
99  LAPACKE_free( iwork );
100 exit_level_0:
101  if( info == LAPACK_WORK_MEMORY_ERROR ) {
102  LAPACKE_xerbla( "LAPACKE_zhbevd", info );
103  }
104  return info;
105 }
#define LAPACK_Z2INT(x)
Definition: lapacke.h:117
#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
lapack_int LAPACKE_zhbevd_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_int kd, lapack_complex_double *ab, lapack_int ldab, double *w, lapack_complex_double *z, lapack_int ldz, lapack_complex_double *work, lapack_int lwork, double *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
#define lapack_complex_double
Definition: lapacke.h:90
lapack_logical LAPACKE_zhb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const lapack_complex_double *ab, lapack_int ldab)
#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
int LAPACKE_get_nancheck()
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