LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ 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 );
80exit_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:87
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
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