LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dbdsdc()

lapack_int LAPACKE_dbdsdc ( int  matrix_layout,
char  uplo,
char  compq,
lapack_int  n,
double *  d,
double *  e,
double *  u,
lapack_int  ldu,
double *  vt,
lapack_int  ldvt,
double *  q,
lapack_int iq 
)

Definition at line 35 of file lapacke_dbdsdc.c.

39 {
40  lapack_int info = 0;
41  /* Additional scalars declarations for work arrays */
42  size_t lwork;
43  lapack_int* iwork = NULL;
44  double* work = NULL;
45  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46  LAPACKE_xerbla( "LAPACKE_dbdsdc", -1 );
47  return -1;
48  }
49 #ifndef LAPACK_DISABLE_NAN_CHECK
50  if( LAPACKE_get_nancheck() ) {
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
53  return -5;
54  }
55  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
56  return -6;
57  }
58  }
59 #endif
60  /* Additional scalars initializations for work arrays */
61  if( LAPACKE_lsame( compq, 'i' ) ) {
62  lwork = (size_t)3*MAX(1,n)*MAX(1,n)+4*MAX(1,n);
63  } else if( LAPACKE_lsame( compq, 'p' ) ) {
64  lwork = MAX(1,6*n);
65  } else if( LAPACKE_lsame( compq, 'n' ) ) {
66  lwork = MAX(1,4*n);
67  } else {
68  lwork = 1; /* Any value */
69  }
70  /* Allocate memory for working array(s) */
71  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*n) );
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_dbdsdc_work( matrix_layout, uplo, compq, n, d, e, u, ldu, vt,
83  ldvt, q, iq, work, iwork );
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_dbdsdc", 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
#define LAPACKE_free(p)
Definition: lapacke.h:46
lapack_int LAPACKE_dbdsdc_work(int matrix_layout, char uplo, char compq, lapack_int n, double *d, double *e, double *u, lapack_int ldu, double *vt, lapack_int ldvt, double *q, lapack_int *iq, double *work, lapack_int *iwork)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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