LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dbdsqr()

lapack_int LAPACKE_dbdsqr ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  ncvt,
lapack_int  nru,
lapack_int  ncc,
double *  d,
double *  e,
double *  vt,
lapack_int  ldvt,
double *  u,
lapack_int  ldu,
double *  c,
lapack_int  ldc 
)

Definition at line 36 of file lapacke_dbdsqr.c.

41 {
42  lapack_int info = 0;
43  double* work = NULL;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_dbdsqr", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  /* Optionally check input matrices for NaNs */
50  if( ncc != 0 ) {
51  if( LAPACKE_dge_nancheck( matrix_layout, n, ncc, c, ldc ) ) {
52  return -13;
53  }
54  }
55  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
56  return -7;
57  }
58  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
59  return -8;
60  }
61  if( nru != 0 ) {
62  if( LAPACKE_dge_nancheck( matrix_layout, nru, n, u, ldu ) ) {
63  return -11;
64  }
65  }
66  if( ncvt != 0 ) {
67  if( LAPACKE_dge_nancheck( matrix_layout, n, ncvt, vt, ldvt ) ) {
68  return -9;
69  }
70  }
71 #endif
72  /* Allocate memory for working array(s) */
73  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,4*n) );
74  if( work == NULL ) {
76  goto exit_level_0;
77  }
78  /* Call middle-level interface */
79  info = LAPACKE_dbdsqr_work( matrix_layout, uplo, n, ncvt, nru, ncc, d, e, vt,
80  ldvt, u, ldu, c, ldc, work );
81  /* Release memory and exit */
82  LAPACKE_free( work );
83 exit_level_0:
84  if( info == LAPACK_WORK_MEMORY_ERROR ) {
85  LAPACKE_xerbla( "LAPACKE_dbdsqr", info );
86  }
87  return info;
88 }
lapack_int LAPACKE_dbdsqr_work(int matrix_layout, char uplo, lapack_int n, lapack_int ncvt, lapack_int nru, lapack_int ncc, double *d, double *e, double *vt, lapack_int ldvt, double *u, lapack_int ldu, double *c, lapack_int ldc, double *work)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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