LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgelss()

lapack_int LAPACKE_sgelss ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  nrhs,
float *  a,
lapack_int  lda,
float *  b,
lapack_int  ldb,
float *  s,
float  rcond,
lapack_int rank 
)

Definition at line 35 of file lapacke_sgelss.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  float* work = NULL;
43  float work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_sgelss", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  if( LAPACKE_get_nancheck() ) {
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_sge_nancheck( matrix_layout, m, n, a, lda ) ) {
52  return -5;
53  }
54  if( LAPACKE_sge_nancheck( matrix_layout, MAX(m,n), nrhs, b, ldb ) ) {
55  return -7;
56  }
57  if( LAPACKE_s_nancheck( 1, &rcond, 1 ) ) {
58  return -10;
59  }
60  }
61 #endif
62  /* Query optimal working array(s) size */
63  info = LAPACKE_sgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
64  rcond, rank, &work_query, lwork );
65  if( info != 0 ) {
66  goto exit_level_0;
67  }
68  lwork = (lapack_int)work_query;
69  /* Allocate memory for work arrays */
70  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
71  if( work == NULL ) {
73  goto exit_level_0;
74  }
75  /* Call middle-level interface */
76  info = LAPACKE_sgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
77  rcond, rank, work, lwork );
78  /* Release memory and exit */
79  LAPACKE_free( work );
80 exit_level_0:
81  if( info == LAPACK_WORK_MEMORY_ERROR ) {
82  LAPACKE_xerbla( "LAPACKE_sgelss", info );
83  }
84  return info;
85 }
#define lapack_int
Definition: lapack.h:83
lapack_int LAPACKE_sgelss_work(int matrix_layout, lapack_int m, lapack_int n, lapack_int nrhs, float *a, lapack_int lda, float *b, lapack_int ldb, float *s, float rcond, lapack_int *rank, float *work, lapack_int lwork)
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:46
Here is the call graph for this function: