LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sbdsqr_work()

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

Definition at line 35 of file lapacke_sbdsqr_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_sbdsqr( &uplo, &n, &ncvt, &nru, &ncc, d, e, vt, &ldvt, u, &ldu,
45  c, &ldc, work, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldc_t = MAX(1,n);
51  lapack_int ldu_t = MAX(1,nru);
52  lapack_int ldvt_t = MAX(1,n);
53  float* vt_t = NULL;
54  float* u_t = NULL;
55  float* c_t = NULL;
56  /* Check leading dimension(s) */
57  if( ldc < ncc ) {
58  info = -14;
59  LAPACKE_xerbla( "LAPACKE_sbdsqr_work", info );
60  return info;
61  }
62  if( ldu < n ) {
63  info = -12;
64  LAPACKE_xerbla( "LAPACKE_sbdsqr_work", info );
65  return info;
66  }
67  if( ldvt < ncvt ) {
68  info = -10;
69  LAPACKE_xerbla( "LAPACKE_sbdsqr_work", info );
70  return info;
71  }
72  /* Allocate memory for temporary array(s) */
73  if( ncvt != 0 ) {
74  vt_t = (float*)
75  LAPACKE_malloc( sizeof(float) * ldvt_t * MAX(1,ncvt) );
76  if( vt_t == NULL ) {
78  goto exit_level_0;
79  }
80  }
81  if( nru != 0 ) {
82  u_t = (float*)LAPACKE_malloc( sizeof(float) * ldu_t * MAX(1,n) );
83  if( u_t == NULL ) {
85  goto exit_level_1;
86  }
87  }
88  if( ncc != 0 ) {
89  c_t = (float*)LAPACKE_malloc( sizeof(float) * ldc_t * MAX(1,ncc) );
90  if( c_t == NULL ) {
92  goto exit_level_2;
93  }
94  }
95  /* Transpose input matrices */
96  if( ncvt != 0 ) {
97  LAPACKE_sge_trans( matrix_layout, n, ncvt, vt, ldvt, vt_t, ldvt_t );
98  }
99  if( nru != 0 ) {
100  LAPACKE_sge_trans( matrix_layout, nru, n, u, ldu, u_t, ldu_t );
101  }
102  if( ncc != 0 ) {
103  LAPACKE_sge_trans( matrix_layout, n, ncc, c, ldc, c_t, ldc_t );
104  }
105  /* Call LAPACK function and adjust info */
106  LAPACK_sbdsqr( &uplo, &n, &ncvt, &nru, &ncc, d, e, vt_t, &ldvt_t, u_t,
107  &ldu_t, c_t, &ldc_t, work, &info );
108  if( info < 0 ) {
109  info = info - 1;
110  }
111  /* Transpose output matrices */
112  if( ncvt != 0 ) {
113  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncvt, vt_t, ldvt_t, vt,
114  ldvt );
115  }
116  if( nru != 0 ) {
117  LAPACKE_sge_trans( LAPACK_COL_MAJOR, nru, n, u_t, ldu_t, u, ldu );
118  }
119  if( ncc != 0 ) {
120  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncc, c_t, ldc_t, c, ldc );
121  }
122  /* Release memory and exit */
123  if( ncc != 0 ) {
124  LAPACKE_free( c_t );
125  }
126 exit_level_2:
127  if( nru != 0 ) {
128  LAPACKE_free( u_t );
129  }
130 exit_level_1:
131  if( ncvt != 0 ) {
132  LAPACKE_free( vt_t );
133  }
134 exit_level_0:
135  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
136  LAPACKE_xerbla( "LAPACKE_sbdsqr_work", info );
137  }
138  } else {
139  info = -1;
140  LAPACKE_xerbla( "LAPACKE_sbdsqr_work", info );
141  }
142  return info;
143 }
#define LAPACK_sbdsqr(...)
Definition: lapack.h:356
#define lapack_int
Definition: lapack.h:83
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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