LAPACK  3.7.1
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  /* Optionally check input matrices for NaNs */
57  if( LAPACKE_zhb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
58  return -6;
59  }
60 #endif
61  /* Query optimal working array(s) size */
62  info = LAPACKE_zhbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
63  ldz, &work_query, lwork, &rwork_query, lrwork,
64  &iwork_query, liwork );
65  if( info != 0 ) {
66  goto exit_level_0;
67  }
68  liwork = (lapack_int)iwork_query;
69  lrwork = (lapack_int)rwork_query;
70  lwork = LAPACK_Z2INT( work_query );
71  /* Allocate memory for work arrays */
72  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
73  if( iwork == NULL ) {
75  goto exit_level_0;
76  }
77  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
78  if( rwork == NULL ) {
80  goto exit_level_1;
81  }
82  work = (lapack_complex_double*)
83  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
84  if( work == NULL ) {
86  goto exit_level_2;
87  }
88  /* Call middle-level interface */
89  info = LAPACKE_zhbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
90  ldz, work, lwork, rwork, lrwork, iwork,
91  liwork );
92  /* Release memory and exit */
93  LAPACKE_free( work );
94 exit_level_2:
95  LAPACKE_free( rwork );
96 exit_level_1:
97  LAPACKE_free( iwork );
98 exit_level_0:
99  if( info == LAPACK_WORK_MEMORY_ERROR ) {
100  LAPACKE_xerbla( "LAPACKE_zhbevd", info );
101  }
102  return info;
103 }
#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
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