LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dggsvd_work()

lapack_int LAPACKE_dggsvd_work ( int  matrix_layout,
char  jobu,
char  jobv,
char  jobq,
lapack_int  m,
lapack_int  n,
lapack_int  p,
lapack_int k,
lapack_int l,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  alpha,
double *  beta,
double *  u,
lapack_int  ldu,
double *  v,
lapack_int  ldv,
double *  q,
lapack_int  ldq,
double *  work,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dggsvd_work.c.

44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_dggsvd( &jobu, &jobv, &jobq, &m, &n, &p, k, l, a, &lda, b, &ldb,
49  alpha, beta, u, &ldu, v, &ldv, q, &ldq, work, iwork,
50  &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int lda_t = MAX(1,m);
56  lapack_int ldb_t = MAX(1,p);
57  lapack_int ldq_t = MAX(1,n);
58  lapack_int ldu_t = MAX(1,m);
59  lapack_int ldv_t = MAX(1,p);
60  double* a_t = NULL;
61  double* b_t = NULL;
62  double* u_t = NULL;
63  double* v_t = NULL;
64  double* q_t = NULL;
65  /* Check leading dimension(s) */
66  if( lda < n ) {
67  info = -11;
68  LAPACKE_xerbla( "LAPACKE_dggsvd_work", info );
69  return info;
70  }
71  if( ldb < n ) {
72  info = -13;
73  LAPACKE_xerbla( "LAPACKE_dggsvd_work", info );
74  return info;
75  }
76  if( ldq < n ) {
77  info = -21;
78  LAPACKE_xerbla( "LAPACKE_dggsvd_work", info );
79  return info;
80  }
81  if( ldu < m ) {
82  info = -17;
83  LAPACKE_xerbla( "LAPACKE_dggsvd_work", info );
84  return info;
85  }
86  if( ldv < p ) {
87  info = -19;
88  LAPACKE_xerbla( "LAPACKE_dggsvd_work", info );
89  return info;
90  }
91  /* Allocate memory for temporary array(s) */
92  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
93  if( a_t == NULL ) {
95  goto exit_level_0;
96  }
97  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
98  if( b_t == NULL ) {
100  goto exit_level_1;
101  }
102  if( LAPACKE_lsame( jobu, 'u' ) ) {
103  u_t = (double*)LAPACKE_malloc( sizeof(double) * ldu_t * MAX(1,m) );
104  if( u_t == NULL ) {
106  goto exit_level_2;
107  }
108  }
109  if( LAPACKE_lsame( jobv, 'v' ) ) {
110  v_t = (double*)LAPACKE_malloc( sizeof(double) * ldv_t * MAX(1,p) );
111  if( v_t == NULL ) {
113  goto exit_level_3;
114  }
115  }
116  if( LAPACKE_lsame( jobq, 'q' ) ) {
117  q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
118  if( q_t == NULL ) {
120  goto exit_level_4;
121  }
122  }
123  /* Transpose input matrices */
124  LAPACKE_dge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
125  LAPACKE_dge_trans( matrix_layout, p, n, b, ldb, b_t, ldb_t );
126  /* Call LAPACK function and adjust info */
127  LAPACK_dggsvd( &jobu, &jobv, &jobq, &m, &n, &p, k, l, a_t, &lda_t, b_t,
128  &ldb_t, alpha, beta, u_t, &ldu_t, v_t, &ldv_t, q_t,
129  &ldq_t, work, iwork, &info );
130  if( info < 0 ) {
131  info = info - 1;
132  }
133  /* Transpose output matrices */
134  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
135  LAPACKE_dge_trans( LAPACK_COL_MAJOR, p, n, b_t, ldb_t, b, ldb );
136  if( LAPACKE_lsame( jobu, 'u' ) ) {
137  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, m, u_t, ldu_t, u, ldu );
138  }
139  if( LAPACKE_lsame( jobv, 'v' ) ) {
140  LAPACKE_dge_trans( LAPACK_COL_MAJOR, p, p, v_t, ldv_t, v, ldv );
141  }
142  if( LAPACKE_lsame( jobq, 'q' ) ) {
143  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
144  }
145  /* Release memory and exit */
146  if( LAPACKE_lsame( jobq, 'q' ) ) {
147  LAPACKE_free( q_t );
148  }
149 exit_level_4:
150  if( LAPACKE_lsame( jobv, 'v' ) ) {
151  LAPACKE_free( v_t );
152  }
153 exit_level_3:
154  if( LAPACKE_lsame( jobu, 'u' ) ) {
155  LAPACKE_free( u_t );
156  }
157 exit_level_2:
158  LAPACKE_free( b_t );
159 exit_level_1:
160  LAPACKE_free( a_t );
161 exit_level_0:
162  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
163  LAPACKE_xerbla( "LAPACKE_dggsvd_work", info );
164  }
165  } else {
166  info = -1;
167  LAPACKE_xerbla( "LAPACKE_dggsvd_work", info );
168  }
169  return info;
170 }
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_dggsvd(char *jobu, char *jobv, char *jobq, lapack_int *m, lapack_int *n, lapack_int *p, lapack_int *k, lapack_int *l, double *a, lapack_int *lda, double *b, lapack_int *ldb, double *alpha, double *beta, double *u, lapack_int *ldu, double *v, lapack_int *ldv, double *q, lapack_int *ldq, double *work, lapack_int *iwork, lapack_int *info)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#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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