LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgesvdq_work()

lapack_int LAPACKE_zgesvdq_work ( int  matrix_layout,
char  joba,
char  jobp,
char  jobr,
char  jobu,
char  jobv,
lapack_int  m,
lapack_int  n,
lapack_complex_double a,
lapack_int  lda,
double *  s,
lapack_complex_double u,
lapack_int  ldu,
lapack_complex_double v,
lapack_int  ldv,
lapack_int numrank,
lapack_int iwork,
lapack_int  liwork,
lapack_complex_double cwork,
lapack_int  lcwork,
double *  rwork,
lapack_int  lrwork 
)

Definition at line 35 of file lapacke_zgesvdq_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_zgesvdq( &joba, &jobp, &jobr, &jobu, &jobv, &m, &n, a, &lda, s, u, &ldu, v, &ldv,
48  numrank, iwork, &liwork, cwork, &lcwork, rwork, &lrwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int nrows_u = ( LAPACKE_lsame( jobu, 'a' ) ||
54  LAPACKE_lsame( jobu, 's' ) ) ? m : 1;
55  lapack_int ncols_u = LAPACKE_lsame( jobu, 'a' ) ? m :
56  (LAPACKE_lsame( jobu, 's' ) ? MIN(m,n) : 1);
57  lapack_int nrows_v = LAPACKE_lsame( jobv, 'a' ) ? n :
58  ( LAPACKE_lsame( jobv, 's' ) ? MIN(m,n) : 1);
59  lapack_int lda_t = MAX(1,m);
60  lapack_int ldu_t = MAX(1,nrows_u);
61  lapack_int ldv_t = MAX(1,nrows_v);
62  lapack_complex_double* a_t = NULL;
63  lapack_complex_double* u_t = NULL;
64  lapack_complex_double* v_t = NULL;
65  /* Check leading dimension(s) */
66  if( lda < n ) {
67  info = -9;
68  LAPACKE_xerbla( "LAPACKE_zgesvdq_work", info );
69  return info;
70  }
71  if( ldu < ncols_u ) {
72  info = -12;
73  LAPACKE_xerbla( "LAPACKE_zgesvdq_work", info );
74  return info;
75  }
76  if( ldv < n ) {
77  info = -14;
78  LAPACKE_xerbla( "LAPACKE_zgesvdq_work", info );
79  return info;
80  }
81  /* Query optimal working array(s) size if requested */
82  if( lcwork == -1 ) {
83  LAPACK_zgesvdq( &joba, &jobp, &jobr, &jobu, &jobv, &m, &n, a, &lda_t,
84  s, u, &ldu_t, v, &ldv_t, numrank, iwork, &liwork,
85  cwork, &lcwork, rwork, &lrwork, &info );
86  return (info < 0) ? (info - 1) : info;
87  }
88  /* Allocate memory for temporary array(s) */
89  a_t = (lapack_complex_double*)LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
90  if( a_t == NULL ) {
92  goto exit_level_0;
93  }
94  if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
95  u_t = (lapack_complex_double*)
96  LAPACKE_malloc( sizeof(lapack_complex_double) * ldu_t * MAX(1,ncols_u) );
97  if( u_t == NULL ) {
99  goto exit_level_1;
100  }
101  }
102  if( LAPACKE_lsame( jobv, 'a' ) || LAPACKE_lsame( jobv, 's' ) ) {
103  v_t = (lapack_complex_double*)
104  LAPACKE_malloc( sizeof(lapack_complex_double) * ldv_t * MAX(1,n) );
105  if( v_t == NULL ) {
107  goto exit_level_2;
108  }
109  }
110  /* Transpose input matrices */
111  LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
112  /* Call LAPACK function and adjust info */
113  LAPACK_zgesvdq( &joba, &jobp, &jobr, &jobu, &jobv, &m, &n, a, &lda_t,
114  s, u, &ldu_t, v, &ldv_t, numrank, iwork, &liwork,
115  cwork, &lcwork, rwork, &lrwork, &info );
116  if( info < 0 ) {
117  info = info - 1;
118  }
119  /* Transpose output matrices */
120  LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
121  if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
122  LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_u, ncols_u, u_t, ldu_t,
123  u, ldu );
124  }
125  if( LAPACKE_lsame( jobv, 'a' ) || LAPACKE_lsame( jobv, 's' ) ) {
126  LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_v, n, v_t, ldv_t, v,
127  ldv );
128  }
129  /* Release memory and exit */
130  if( LAPACKE_lsame( jobv, 'a' ) || LAPACKE_lsame( jobv, 's' ) ) {
131  LAPACKE_free( v_t );
132  }
133 exit_level_2:
134  if( LAPACKE_lsame( jobu, 'a' ) || LAPACKE_lsame( jobu, 's' ) ) {
135  LAPACKE_free( u_t );
136  }
137 exit_level_1:
138  LAPACKE_free( a_t );
139 exit_level_0:
140  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
141  LAPACKE_xerbla( "LAPACKE_zgesvdq_work", info );
142  }
143  } else {
144  info = -1;
145  LAPACKE_xerbla( "LAPACKE_zgesvdq_work", info );
146  }
147  return info;
148 }
#define LAPACK_zgesvdq(...)
Definition: lapack.h:3520
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#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
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
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)
#define MIN(x, y)
Definition: lapacke_utils.h:49
#define MAX(x, y)
Definition: lapacke_utils.h:46
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