LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zbdsqr_work()

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

Definition at line 36 of file lapacke_zbdsqr_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_zbdsqr( &uplo, &n, &ncvt, &nru, &ncc, d, e, vt, &ldvt, u, &ldu,
47  c, &ldc, work, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldc_t = MAX(1,n);
53  lapack_int ldu_t = MAX(1,nru);
54  lapack_int ldvt_t = MAX(1,n);
55  lapack_complex_double* vt_t = NULL;
56  lapack_complex_double* u_t = NULL;
57  lapack_complex_double* c_t = NULL;
58  /* Check leading dimension(s) */
59  if( ldc < ncc ) {
60  info = -14;
61  LAPACKE_xerbla( "LAPACKE_zbdsqr_work", info );
62  return info;
63  }
64  if( ldu < n ) {
65  info = -12;
66  LAPACKE_xerbla( "LAPACKE_zbdsqr_work", info );
67  return info;
68  }
69  if( ldvt < ncvt ) {
70  info = -10;
71  LAPACKE_xerbla( "LAPACKE_zbdsqr_work", info );
72  return info;
73  }
74  /* Allocate memory for temporary array(s) */
75  if( ncvt != 0 ) {
76  vt_t = (lapack_complex_double*)
78  ldvt_t * MAX(1,ncvt) );
79  if( vt_t == NULL ) {
81  goto exit_level_0;
82  }
83  }
84  if( nru != 0 ) {
85  u_t = (lapack_complex_double*)
87  ldu_t * MAX(1,n) );
88  if( u_t == NULL ) {
90  goto exit_level_1;
91  }
92  }
93  if( ncc != 0 ) {
94  c_t = (lapack_complex_double*)
96  ldc_t * MAX(1,ncc) );
97  if( c_t == NULL ) {
99  goto exit_level_2;
100  }
101  }
102  /* Transpose input matrices */
103  if( ncvt != 0 ) {
104  LAPACKE_zge_trans( matrix_layout, n, ncvt, vt, ldvt, vt_t, ldvt_t );
105  }
106  if( nru != 0 ) {
107  LAPACKE_zge_trans( matrix_layout, nru, n, u, ldu, u_t, ldu_t );
108  }
109  if( ncc != 0 ) {
110  LAPACKE_zge_trans( matrix_layout, n, ncc, c, ldc, c_t, ldc_t );
111  }
112  /* Call LAPACK function and adjust info */
113  LAPACK_zbdsqr( &uplo, &n, &ncvt, &nru, &ncc, d, e, vt_t, &ldvt_t, u_t,
114  &ldu_t, c_t, &ldc_t, work, &info );
115  if( info < 0 ) {
116  info = info - 1;
117  }
118  /* Transpose output matrices */
119  if( ncvt != 0 ) {
120  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncvt, vt_t, ldvt_t, vt,
121  ldvt );
122  }
123  if( nru != 0 ) {
124  LAPACKE_zge_trans( LAPACK_COL_MAJOR, nru, n, u_t, ldu_t, u, ldu );
125  }
126  if( ncc != 0 ) {
127  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncc, c_t, ldc_t, c, ldc );
128  }
129  /* Release memory and exit */
130  if( ncc != 0 ) {
131  LAPACKE_free( c_t );
132  }
133 exit_level_2:
134  if( nru != 0 ) {
135  LAPACKE_free( u_t );
136  }
137 exit_level_1:
138  if( ncvt != 0 ) {
139  LAPACKE_free( vt_t );
140  }
141 exit_level_0:
142  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
143  LAPACKE_xerbla( "LAPACKE_zbdsqr_work", info );
144  }
145  } else {
146  info = -1;
147  LAPACKE_xerbla( "LAPACKE_zbdsqr_work", info );
148  }
149  return info;
150 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACK_zbdsqr(char *uplo, lapack_int *n, lapack_int *ncvt, lapack_int *nru, lapack_int *ncc, double *d, double *e, lapack_complex_double *vt, lapack_int *ldvt, lapack_complex_double *u, lapack_int *ldu, lapack_complex_double *c, lapack_int *ldc, double *work, lapack_int *info)
#define lapack_complex_double
Definition: lapacke.h:90
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#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
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
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