LAPACK  3.10.1
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 35 of file lapacke_zhbevd.c.

39 {
40  lapack_int info = 0;
41  lapack_int liwork = -1;
42  lapack_int lrwork = -1;
43  lapack_int lwork = -1;
44  lapack_int* iwork = NULL;
45  double* rwork = NULL;
46  lapack_complex_double* work = NULL;
47  lapack_int iwork_query;
48  double rwork_query;
49  lapack_complex_double work_query;
50  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
51  LAPACKE_xerbla( "LAPACKE_zhbevd", -1 );
52  return -1;
53  }
54 #ifndef LAPACK_DISABLE_NAN_CHECK
55  if( LAPACKE_get_nancheck() ) {
56  /* Optionally check input matrices for NaNs */
57  if( LAPACKE_zhb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
58  return -6;
59  }
60  }
61 #endif
62  /* Query optimal working array(s) size */
63  info = LAPACKE_zhbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
64  ldz, &work_query, lwork, &rwork_query, lrwork,
65  &iwork_query, liwork );
66  if( info != 0 ) {
67  goto exit_level_0;
68  }
69  liwork = iwork_query;
70  lrwork = (lapack_int)rwork_query;
71  lwork = LAPACK_Z2INT( work_query );
72  /* Allocate memory for work arrays */
73  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
74  if( iwork == NULL ) {
76  goto exit_level_0;
77  }
78  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
79  if( rwork == NULL ) {
81  goto exit_level_1;
82  }
83  work = (lapack_complex_double*)
84  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
85  if( work == NULL ) {
87  goto exit_level_2;
88  }
89  /* Call middle-level interface */
90  info = LAPACKE_zhbevd_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
91  ldz, work, lwork, rwork, lrwork, iwork,
92  liwork );
93  /* Release memory and exit */
94  LAPACKE_free( work );
95 exit_level_2:
96  LAPACKE_free( rwork );
97 exit_level_1:
98  LAPACKE_free( iwork );
99 exit_level_0:
100  if( info == LAPACK_WORK_MEMORY_ERROR ) {
101  LAPACKE_xerbla( "LAPACKE_zhbevd", info );
102  }
103  return info;
104 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
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_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACK_Z2INT(x)
Definition: lapacke.h:50
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_zhb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const lapack_complex_double *ab, lapack_int ldab)
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