LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgels_work()

lapack_int LAPACKE_cgels_work ( int  matrix_layout,
char  trans,
lapack_int  m,
lapack_int  n,
lapack_int  nrhs,
lapack_complex_float a,
lapack_int  lda,
lapack_complex_float b,
lapack_int  ldb,
lapack_complex_float work,
lapack_int  lwork 
)

Definition at line 36 of file lapacke_cgels_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_cgels( &trans, &m, &n, &nrhs, a, &lda, b, &ldb, work, &lwork,
46  &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int lda_t = MAX(1,m);
52  lapack_int ldb_t = MAX(1,MAX(m,n));
53  lapack_complex_float* a_t = NULL;
54  lapack_complex_float* b_t = NULL;
55  /* Check leading dimension(s) */
56  if( lda < n ) {
57  info = -7;
58  LAPACKE_xerbla( "LAPACKE_cgels_work", info );
59  return info;
60  }
61  if( ldb < nrhs ) {
62  info = -9;
63  LAPACKE_xerbla( "LAPACKE_cgels_work", info );
64  return info;
65  }
66  /* Query optimal working array(s) size if requested */
67  if( lwork == -1 ) {
68  LAPACK_cgels( &trans, &m, &n, &nrhs, a, &lda_t, b, &ldb_t, work,
69  &lwork, &info );
70  return (info < 0) ? (info - 1) : info;
71  }
72  /* Allocate memory for temporary array(s) */
73  a_t = (lapack_complex_float*)
74  LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
75  if( a_t == NULL ) {
77  goto exit_level_0;
78  }
79  b_t = (lapack_complex_float*)
81  ldb_t * MAX(1,nrhs) );
82  if( b_t == NULL ) {
84  goto exit_level_1;
85  }
86  /* Transpose input matrices */
87  LAPACKE_cge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
88  LAPACKE_cge_trans( matrix_layout, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
89  /* Call LAPACK function and adjust info */
90  LAPACK_cgels( &trans, &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, work,
91  &lwork, &info );
92  if( info < 0 ) {
93  info = info - 1;
94  }
95  /* Transpose output matrices */
96  LAPACKE_cge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
97  LAPACKE_cge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
98  ldb );
99  /* Release memory and exit */
100  LAPACKE_free( b_t );
101 exit_level_1:
102  LAPACKE_free( a_t );
103 exit_level_0:
104  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_cgels_work", info );
106  }
107  } else {
108  info = -1;
109  LAPACKE_xerbla( "LAPACKE_cgels_work", info );
110  }
111  return info;
112 }
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
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
void LAPACK_cgels(char *trans, lapack_int *m, lapack_int *n, lapack_int *nrhs, lapack_complex_float *a, lapack_int *lda, lapack_complex_float *b, lapack_int *ldb, lapack_complex_float *work, lapack_int *lwork, lapack_int *info)
#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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