LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgelsd_work()

lapack_int LAPACKE_cgelsd_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  nrhs,
lapack_complex_float a,
lapack_int  lda,
lapack_complex_float b,
lapack_int  ldb,
float *  s,
float  rcond,
lapack_int rank,
lapack_complex_float work,
lapack_int  lwork,
float *  rwork,
lapack_int iwork 
)

Definition at line 36 of file lapacke_cgelsd_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_cgelsd( &m, &n, &nrhs, a, &lda, b, &ldb, s, &rcond, rank, work,
48  &lwork, rwork, iwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int lda_t = MAX(1,m);
54  lapack_int ldb_t = MAX(1,MAX(m,n));
55  lapack_complex_float* a_t = NULL;
56  lapack_complex_float* b_t = NULL;
57  /* Check leading dimension(s) */
58  if( lda < n ) {
59  info = -6;
60  LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
61  return info;
62  }
63  if( ldb < nrhs ) {
64  info = -8;
65  LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
66  return info;
67  }
68  /* Query optimal working array(s) size if requested */
69  if( lwork == -1 ) {
70  LAPACK_cgelsd( &m, &n, &nrhs, a, &lda_t, b, &ldb_t, s, &rcond, rank,
71  work, &lwork, rwork, iwork, &info );
72  return (info < 0) ? (info - 1) : info;
73  }
74  /* Allocate memory for temporary array(s) */
75  a_t = (lapack_complex_float*)
76  LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
77  if( a_t == NULL ) {
79  goto exit_level_0;
80  }
81  b_t = (lapack_complex_float*)
83  ldb_t * MAX(1,nrhs) );
84  if( b_t == NULL ) {
86  goto exit_level_1;
87  }
88  /* Transpose input matrices */
89  LAPACKE_cge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
90  LAPACKE_cge_trans( matrix_layout, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
91  /* Call LAPACK function and adjust info */
92  LAPACK_cgelsd( &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, s, &rcond, rank,
93  work, &lwork, rwork, iwork, &info );
94  if( info < 0 ) {
95  info = info - 1;
96  }
97  /* Transpose output matrices */
98  LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
99  LAPACKE_cge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
100  ldb );
101  /* Release memory and exit */
102  LAPACKE_free( b_t );
103 exit_level_1:
104  LAPACKE_free( a_t );
105 exit_level_0:
106  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
107  LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
108  }
109  } else {
110  info = -1;
111  LAPACKE_xerbla( "LAPACKE_cgelsd_work", info );
112  }
113  return info;
114 }
void LAPACKE_cge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
void LAPACK_cgelsd(lapack_int *m, lapack_int *n, lapack_int *nrhs, lapack_complex_float *a, lapack_int *lda, lapack_complex_float *b, lapack_int *ldb, float *s, float *rcond, lapack_int *rank, lapack_complex_float *work, lapack_int *lwork, float *rwork, lapack_int *iwork, lapack_int *info)
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
#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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