LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgelss()

lapack_int LAPACKE_cgelss ( 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 
)

Definition at line 36 of file lapacke_cgelss.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  float* rwork = NULL;
45  lapack_complex_float* work = NULL;
46  lapack_complex_float work_query;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_cgelss", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_cge_nancheck( matrix_layout, m, n, a, lda ) ) {
55  return -5;
56  }
57  if( LAPACKE_cge_nancheck( matrix_layout, MAX(m,n), nrhs, b, ldb ) ) {
58  return -7;
59  }
60  if( LAPACKE_s_nancheck( 1, &rcond, 1 ) ) {
61  return -10;
62  }
63  }
64 #endif
65  /* Allocate memory for working array(s) */
66  rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,5*MIN(m,n)) );
67  if( rwork == NULL ) {
69  goto exit_level_0;
70  }
71  /* Query optimal working array(s) size */
72  info = LAPACKE_cgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
73  rcond, rank, &work_query, lwork, rwork );
74  if( info != 0 ) {
75  goto exit_level_1;
76  }
77  lwork = LAPACK_C2INT( work_query );
78  /* Allocate memory for work arrays */
79  work = (lapack_complex_float*)
80  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
81  if( work == NULL ) {
83  goto exit_level_1;
84  }
85  /* Call middle-level interface */
86  info = LAPACKE_cgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
87  rcond, rank, work, lwork, rwork );
88  /* Release memory and exit */
89  LAPACKE_free( work );
90 exit_level_1:
91  LAPACKE_free( rwork );
92 exit_level_0:
93  if( info == LAPACK_WORK_MEMORY_ERROR ) {
94  LAPACKE_xerbla( "LAPACKE_cgelss", info );
95  }
96  return info;
97 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
#define MIN(x, y)
Definition: lapacke_utils.h:50
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_C2INT(x)
Definition: lapacke.h:116
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_int LAPACKE_cgelss_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)
#define lapack_int
Definition: lapacke.h:47
int LAPACKE_get_nancheck()
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