LAPACK  3.8.0
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 36 of file lapacke_sbdsqr_work.c.

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