LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgels_work()

lapack_int LAPACKE_sgels_work ( int  matrix_layout,
char  trans,
lapack_int  m,
lapack_int  n,
lapack_int  nrhs,
float *  a,
lapack_int  lda,
float *  b,
lapack_int  ldb,
float *  work,
lapack_int  lwork 
)

Definition at line 35 of file lapacke_sgels_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_sgels( &trans, &m, &n, &nrhs, a, &lda, b, &ldb, work, &lwork,
44  &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int lda_t = MAX(1,m);
50  lapack_int ldb_t = MAX(1,MAX(m,n));
51  float* a_t = NULL;
52  float* b_t = NULL;
53  /* Check leading dimension(s) */
54  if( lda < n ) {
55  info = -7;
56  LAPACKE_xerbla( "LAPACKE_sgels_work", info );
57  return info;
58  }
59  if( ldb < nrhs ) {
60  info = -9;
61  LAPACKE_xerbla( "LAPACKE_sgels_work", info );
62  return info;
63  }
64  /* Query optimal working array(s) size if requested */
65  if( lwork == -1 ) {
66  LAPACK_sgels( &trans, &m, &n, &nrhs, a, &lda_t, b, &ldb_t, work,
67  &lwork, &info );
68  return (info < 0) ? (info - 1) : info;
69  }
70  /* Allocate memory for temporary array(s) */
71  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
72  if( a_t == NULL ) {
74  goto exit_level_0;
75  }
76  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
77  if( b_t == NULL ) {
79  goto exit_level_1;
80  }
81  /* Transpose input matrices */
82  LAPACKE_sge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
83  LAPACKE_sge_trans( matrix_layout, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
84  /* Call LAPACK function and adjust info */
85  LAPACK_sgels( &trans, &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, work,
86  &lwork, &info );
87  if( info < 0 ) {
88  info = info - 1;
89  }
90  /* Transpose output matrices */
91  LAPACKE_sge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
92  LAPACKE_sge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
93  ldb );
94  /* Release memory and exit */
95  LAPACKE_free( b_t );
96 exit_level_1:
97  LAPACKE_free( a_t );
98 exit_level_0:
99  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
100  LAPACKE_xerbla( "LAPACKE_sgels_work", info );
101  }
102  } else {
103  info = -1;
104  LAPACKE_xerbla( "LAPACKE_sgels_work", info );
105  }
106  return info;
107 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_sgels(...)
Definition: lapack.h:2239
#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
void LAPACKE_xerbla(const char *name, 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:46
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