LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhbgvd()

lapack_int LAPACKE_zhbgvd ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  ka,
lapack_int  kb,
lapack_complex_double ab,
lapack_int  ldab,
lapack_complex_double bb,
lapack_int  ldbb,
double *  w,
lapack_complex_double z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_zhbgvd.c.

41 {
42  lapack_int info = 0;
43  lapack_int liwork = -1;
44  lapack_int lrwork = -1;
45  lapack_int lwork = -1;
46  lapack_int* iwork = NULL;
47  double* rwork = NULL;
48  lapack_complex_double* work = NULL;
49  lapack_int iwork_query;
50  double rwork_query;
51  lapack_complex_double work_query;
52  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
53  LAPACKE_xerbla( "LAPACKE_zhbgvd", -1 );
54  return -1;
55  }
56 #ifndef LAPACK_DISABLE_NAN_CHECK
57  if( LAPACKE_get_nancheck() ) {
58  /* Optionally check input matrices for NaNs */
59  if( LAPACKE_zhb_nancheck( matrix_layout, uplo, n, ka, ab, ldab ) ) {
60  return -7;
61  }
62  if( LAPACKE_zhb_nancheck( matrix_layout, uplo, n, kb, bb, ldbb ) ) {
63  return -9;
64  }
65  }
66 #endif
67  /* Query optimal working array(s) size */
68  info = LAPACKE_zhbgvd_work( matrix_layout, jobz, uplo, n, ka, kb, ab, ldab,
69  bb, ldbb, w, z, ldz, &work_query, lwork,
70  &rwork_query, lrwork, &iwork_query, liwork );
71  if( info != 0 ) {
72  goto exit_level_0;
73  }
74  liwork = (lapack_int)iwork_query;
75  lrwork = (lapack_int)rwork_query;
76  lwork = LAPACK_Z2INT( work_query );
77  /* Allocate memory for work arrays */
78  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
79  if( iwork == NULL ) {
81  goto exit_level_0;
82  }
83  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
84  if( rwork == NULL ) {
86  goto exit_level_1;
87  }
88  work = (lapack_complex_double*)
89  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
90  if( work == NULL ) {
92  goto exit_level_2;
93  }
94  /* Call middle-level interface */
95  info = LAPACKE_zhbgvd_work( matrix_layout, jobz, uplo, n, ka, kb, ab, ldab,
96  bb, ldbb, w, z, ldz, work, lwork, rwork, lrwork,
97  iwork, liwork );
98  /* Release memory and exit */
99  LAPACKE_free( work );
100 exit_level_2:
101  LAPACKE_free( rwork );
102 exit_level_1:
103  LAPACKE_free( iwork );
104 exit_level_0:
105  if( info == LAPACK_WORK_MEMORY_ERROR ) {
106  LAPACKE_xerbla( "LAPACKE_zhbgvd", info );
107  }
108  return info;
109 }
#define LAPACK_Z2INT(x)
Definition: lapacke.h:117
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_int LAPACKE_zhbgvd_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_int ka, lapack_int kb, lapack_complex_double *ab, lapack_int ldab, lapack_complex_double *bb, lapack_int ldbb, 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_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#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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