LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dgelsd()

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

Definition at line 35 of file lapacke_dgelsd.c.

39{
40 lapack_int info = 0;
41 lapack_int lwork = -1;
42 /* Additional scalars declarations for work arrays */
43 lapack_int liwork;
44 lapack_int* iwork = NULL;
45 double* work = NULL;
46 lapack_int iwork_query;
47 double work_query;
48 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49 LAPACKE_xerbla( "LAPACKE_dgelsd", -1 );
50 return -1;
51 }
52#ifndef LAPACK_DISABLE_NAN_CHECK
53 if( LAPACKE_get_nancheck() ) {
54 /* Optionally check input matrices for NaNs */
55 if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
56 return -5;
57 }
58 if( LAPACKE_dge_nancheck( matrix_layout, MAX(m,n), nrhs, b, ldb ) ) {
59 return -7;
60 }
61 if( LAPACKE_d_nancheck( 1, &rcond, 1 ) ) {
62 return -10;
63 }
64 }
65#endif
66 /* Query optimal working array(s) size */
67 info = LAPACKE_dgelsd_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
68 rcond, rank, &work_query, lwork, &iwork_query );
69 if( info != 0 ) {
70 goto exit_level_0;
71 }
72 liwork = iwork_query;
73 lwork = (lapack_int)work_query;
74 /* Allocate memory for work arrays */
75 iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
76 if( iwork == NULL ) {
78 goto exit_level_0;
79 }
80 work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
81 if( work == NULL ) {
83 goto exit_level_1;
84 }
85 /* Call middle-level interface */
86 info = LAPACKE_dgelsd_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
87 rcond, rank, work, lwork, iwork );
88 /* Release memory and exit */
89 LAPACKE_free( work );
90exit_level_1:
91 LAPACKE_free( iwork );
92exit_level_0:
93 if( info == LAPACK_WORK_MEMORY_ERROR ) {
94 LAPACKE_xerbla( "LAPACKE_dgelsd", info );
95 }
96 return info;
97}
#define lapack_int
Definition: lapack.h:87
#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
lapack_int LAPACKE_dgelsd_work(int matrix_layout, lapack_int m, lapack_int n, lapack_int nrhs, double *a, lapack_int lda, double *b, lapack_int ldb, double *s, double rcond, lapack_int *rank, double *work, lapack_int lwork, lapack_int *iwork)
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
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