LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dbdsqr_work()

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 
)

Definition at line 36 of file lapacke_dbdsqr_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dbdsqr( &uplo, &n, &ncvt, &nru, &ncc, d, e, vt, &ldvt, u, &ldu,
46  c, &ldc, work, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int ldc_t = MAX(1,n);
52  lapack_int ldu_t = MAX(1,nru);
53  lapack_int ldvt_t = MAX(1,n);
54  double* vt_t = NULL;
55  double* u_t = NULL;
56  double* c_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldc < ncc ) {
59  info = -14;
60  LAPACKE_xerbla( "LAPACKE_dbdsqr_work", info );
61  return info;
62  }
63  if( ldu < n ) {
64  info = -12;
65  LAPACKE_xerbla( "LAPACKE_dbdsqr_work", info );
66  return info;
67  }
68  if( ldvt < ncvt ) {
69  info = -10;
70  LAPACKE_xerbla( "LAPACKE_dbdsqr_work", info );
71  return info;
72  }
73  /* Allocate memory for temporary array(s) */
74  if( ncvt != 0 ) {
75  vt_t = (double*)
76  LAPACKE_malloc( sizeof(double) * ldvt_t * MAX(1,ncvt) );
77  if( vt_t == NULL ) {
79  goto exit_level_0;
80  }
81  }
82  if( nru != 0 ) {
83  u_t = (double*)LAPACKE_malloc( sizeof(double) * ldu_t * MAX(1,n) );
84  if( u_t == NULL ) {
86  goto exit_level_1;
87  }
88  }
89  if( ncc != 0 ) {
90  c_t = (double*)
91  LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,ncc) );
92  if( c_t == NULL ) {
94  goto exit_level_2;
95  }
96  }
97  /* Transpose input matrices */
98  if( ncvt != 0 ) {
99  LAPACKE_dge_trans( matrix_layout, n, ncvt, vt, ldvt, vt_t, ldvt_t );
100  }
101  if( nru != 0 ) {
102  LAPACKE_dge_trans( matrix_layout, nru, n, u, ldu, u_t, ldu_t );
103  }
104  if( ncc != 0 ) {
105  LAPACKE_dge_trans( matrix_layout, n, ncc, c, ldc, c_t, ldc_t );
106  }
107  /* Call LAPACK function and adjust info */
108  LAPACK_dbdsqr( &uplo, &n, &ncvt, &nru, &ncc, d, e, vt_t, &ldvt_t, u_t,
109  &ldu_t, c_t, &ldc_t, work, &info );
110  if( info < 0 ) {
111  info = info - 1;
112  }
113  /* Transpose output matrices */
114  if( ncvt != 0 ) {
115  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncvt, vt_t, ldvt_t, vt,
116  ldvt );
117  }
118  if( nru != 0 ) {
119  LAPACKE_dge_trans( LAPACK_COL_MAJOR, nru, n, u_t, ldu_t, u, ldu );
120  }
121  if( ncc != 0 ) {
122  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncc, c_t, ldc_t, c, ldc );
123  }
124  /* Release memory and exit */
125  if( ncc != 0 ) {
126  LAPACKE_free( c_t );
127  }
128 exit_level_2:
129  if( nru != 0 ) {
130  LAPACKE_free( u_t );
131  }
132 exit_level_1:
133  if( ncvt != 0 ) {
134  LAPACKE_free( vt_t );
135  }
136 exit_level_0:
137  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
138  LAPACKE_xerbla( "LAPACKE_dbdsqr_work", info );
139  }
140  } else {
141  info = -1;
142  LAPACKE_xerbla( "LAPACKE_dbdsqr_work", info );
143  }
144  return info;
145 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_dbdsqr(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, lapack_int *info)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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