LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dgesdd()

lapack_int LAPACKE_dgesdd ( int  matrix_layout,
char  jobz,
lapack_int  m,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  s,
double *  u,
lapack_int  ldu,
double *  vt,
lapack_int  ldvt 
)

Definition at line 35 of file lapacke_dgesdd.c.

39{
40 lapack_int info = 0;
41 lapack_int lwork = -1;
42 lapack_int* iwork = NULL;
43 double* work = NULL;
44 double work_query;
45 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46 LAPACKE_xerbla( "LAPACKE_dgesdd", -1 );
47 return -1;
48 }
49#ifndef LAPACK_DISABLE_NAN_CHECK
50 if( LAPACKE_get_nancheck() ) {
51 /* Optionally check input matrices for NaNs */
52 if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
53 return -5;
54 }
55 }
56#endif
57 /* Allocate memory for working array(s) */
58 iwork = (lapack_int*)
59 LAPACKE_malloc( sizeof(lapack_int) * MAX(1,8*MIN(m,n)) );
60 if( iwork == NULL ) {
62 goto exit_level_0;
63 }
64 /* Query optimal working array(s) size */
65 info = LAPACKE_dgesdd_work( matrix_layout, jobz, m, n, a, lda, s, u, ldu, vt,
66 ldvt, &work_query, lwork, iwork );
67 if( info != 0 ) {
68 goto exit_level_1;
69 }
70 lwork = (lapack_int)work_query;
71 /* Allocate memory for work arrays */
72 work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
73 if( work == NULL ) {
75 goto exit_level_1;
76 }
77 /* Call middle-level interface */
78 info = LAPACKE_dgesdd_work( matrix_layout, jobz, m, n, a, lda, s, u, ldu, vt,
79 ldvt, work, lwork, iwork );
80 /* Release memory and exit */
81 LAPACKE_free( work );
82exit_level_1:
83 LAPACKE_free( iwork );
84exit_level_0:
85 if( info == LAPACK_WORK_MEMORY_ERROR ) {
86 LAPACKE_xerbla( "LAPACKE_dgesdd", info );
87 }
88 return info;
89}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
lapack_int LAPACKE_dgesdd_work(int matrix_layout, char jobz, lapack_int m, lapack_int n, double *a, lapack_int lda, double *s, double *u, lapack_int ldu, double *vt, lapack_int ldvt, double *work, lapack_int lwork, lapack_int *iwork)
#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)
#define MIN(x, y)
Definition: lapacke_utils.h:49
#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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