LAPACK  3.10.1
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 35 of file lapacke_zhbgvd.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_zhbgvd", -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, ka, ab, ldab ) ) {
59  return -7;
60  }
61  if( LAPACKE_zhb_nancheck( matrix_layout, uplo, n, kb, bb, ldbb ) ) {
62  return -9;
63  }
64  }
65 #endif
66  /* Query optimal working array(s) size */
67  info = LAPACKE_zhbgvd_work( matrix_layout, jobz, uplo, n, ka, kb, ab, ldab,
68  bb, ldbb, w, z, ldz, &work_query, lwork,
69  &rwork_query, lrwork, &iwork_query, liwork );
70  if( info != 0 ) {
71  goto exit_level_0;
72  }
73  liwork = iwork_query;
74  lrwork = (lapack_int)rwork_query;
75  lwork = LAPACK_Z2INT( work_query );
76  /* Allocate memory for work arrays */
77  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
78  if( iwork == NULL ) {
80  goto exit_level_0;
81  }
82  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
83  if( rwork == NULL ) {
85  goto exit_level_1;
86  }
87  work = (lapack_complex_double*)
88  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
89  if( work == NULL ) {
91  goto exit_level_2;
92  }
93  /* Call middle-level interface */
94  info = LAPACKE_zhbgvd_work( matrix_layout, jobz, uplo, n, ka, kb, ab, ldab,
95  bb, ldbb, w, z, ldz, work, lwork, rwork, lrwork,
96  iwork, liwork );
97  /* Release memory and exit */
98  LAPACKE_free( work );
99 exit_level_2:
100  LAPACKE_free( rwork );
101 exit_level_1:
102  LAPACKE_free( iwork );
103 exit_level_0:
104  if( info == LAPACK_WORK_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_zhbgvd", info );
106  }
107  return info;
108 }
#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
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
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)
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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