LAPACK  3.8.0
LAPACK: Linear Algebra PACKage
lapacke_dsbgvd.c
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28 *****************************************************************************
29 * Contents: Native high-level C interface to LAPACK function dsbgvd
30 * Author: Intel Corporation
31 * Generated November 2015
32 *****************************************************************************/
33 
34 #include "lapacke_utils.h"
35 
36 lapack_int LAPACKE_dsbgvd( int matrix_layout, char jobz, char uplo, lapack_int n,
37  lapack_int ka, lapack_int kb, double* ab,
38  lapack_int ldab, double* bb, lapack_int ldbb,
39  double* w, double* z, lapack_int ldz )
40 {
41  lapack_int info = 0;
42  lapack_int liwork = -1;
43  lapack_int lwork = -1;
44  lapack_int* iwork = NULL;
45  double* work = NULL;
46  lapack_int iwork_query;
47  double work_query;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_dsbgvd", -1 );
50  return -1;
51  }
52 #ifndef LAPACK_DISABLE_NAN_CHECK
53  if( LAPACKE_get_nancheck() ) {
54  /* Optionally check input matrices for NaNs */
55  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, ka, ab, ldab ) ) {
56  return -7;
57  }
58  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kb, bb, ldbb ) ) {
59  return -9;
60  }
61  }
62 #endif
63  /* Query optimal working array(s) size */
64  info = LAPACKE_dsbgvd_work( matrix_layout, jobz, uplo, n, ka, kb, ab, ldab,
65  bb, ldbb, w, z, ldz, &work_query, lwork,
66  &iwork_query, liwork );
67  if( info != 0 ) {
68  goto exit_level_0;
69  }
70  liwork = (lapack_int)iwork_query;
71  lwork = (lapack_int)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  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
79  if( work == NULL ) {
81  goto exit_level_1;
82  }
83  /* Call middle-level interface */
84  info = LAPACKE_dsbgvd_work( matrix_layout, jobz, uplo, n, ka, kb, ab, ldab,
85  bb, ldbb, w, z, ldz, work, lwork, iwork,
86  liwork );
87  /* Release memory and exit */
88  LAPACKE_free( work );
89 exit_level_1:
90  LAPACKE_free( iwork );
91 exit_level_0:
92  if( info == LAPACK_WORK_MEMORY_ERROR ) {
93  LAPACKE_xerbla( "LAPACKE_dsbgvd", info );
94  }
95  return info;
96 }
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
int LAPACKE_get_nancheck()
lapack_int LAPACKE_dsbgvd_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_int ka, lapack_int kb, double *ab, lapack_int ldab, double *bb, lapack_int ldbb, double *w, double *z, lapack_int ldz, double *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
lapack_int LAPACKE_dsbgvd(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_int ka, lapack_int kb, double *ab, lapack_int ldab, double *bb, lapack_int ldbb, double *w, double *z, lapack_int ldz)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_dsb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *ab, lapack_int ldab)