LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dspgvd()

lapack_int LAPACKE_dspgvd ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
double *  ap,
double *  bp,
double *  w,
double *  z,
lapack_int  ldz 
)

Definition at line 35 of file lapacke_dspgvd.c.

38 {
39  lapack_int info = 0;
40  lapack_int liwork = -1;
41  lapack_int lwork = -1;
42  lapack_int* iwork = NULL;
43  double* work = NULL;
44  lapack_int iwork_query;
45  double work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_dspgvd", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_dsp_nancheck( n, ap ) ) {
54  return -6;
55  }
56  if( LAPACKE_dsp_nancheck( n, bp ) ) {
57  return -7;
58  }
59  }
60 #endif
61  /* Query optimal working array(s) size */
62  info = LAPACKE_dspgvd_work( matrix_layout, itype, jobz, uplo, n, ap, bp, w,
63  z, ldz, &work_query, lwork, &iwork_query,
64  liwork );
65  if( info != 0 ) {
66  goto exit_level_0;
67  }
68  liwork = iwork_query;
69  lwork = (lapack_int)work_query;
70  /* Allocate memory for work arrays */
71  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
72  if( iwork == NULL ) {
74  goto exit_level_0;
75  }
76  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
77  if( work == NULL ) {
79  goto exit_level_1;
80  }
81  /* Call middle-level interface */
82  info = LAPACKE_dspgvd_work( matrix_layout, itype, jobz, uplo, n, ap, bp, w,
83  z, ldz, work, lwork, iwork, liwork );
84  /* Release memory and exit */
85  LAPACKE_free( work );
86 exit_level_1:
87  LAPACKE_free( iwork );
88 exit_level_0:
89  if( info == LAPACK_WORK_MEMORY_ERROR ) {
90  LAPACKE_xerbla( "LAPACKE_dspgvd", info );
91  }
92  return info;
93 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
lapack_int LAPACKE_dspgvd_work(int matrix_layout, lapack_int itype, char jobz, char uplo, lapack_int n, double *ap, double *bp, double *w, double *z, lapack_int ldz, double *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_dsp_nancheck(lapack_int n, const double *ap)
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