LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dggsvp3()

lapack_int LAPACKE_dggsvp3 ( int  matrix_layout,
char  jobu,
char  jobv,
char  jobq,
lapack_int  m,
lapack_int  p,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double  tola,
double  tolb,
lapack_int k,
lapack_int l,
double *  u,
lapack_int  ldu,
double *  v,
lapack_int  ldv,
double *  q,
lapack_int  ldq 
)

Definition at line 35 of file lapacke_dggsvp3.c.

41 {
42  lapack_int info = 0;
43  lapack_int* iwork = NULL;
44  double* tau = NULL;
45  double* work = NULL;
46  lapack_int lwork = -1;
47  double work_query;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_dggsvp3", -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 -8;
57  }
58  if( LAPACKE_dge_nancheck( matrix_layout, p, n, b, ldb ) ) {
59  return -10;
60  }
61  if( LAPACKE_d_nancheck( 1, &tola, 1 ) ) {
62  return -12;
63  }
64  if( LAPACKE_d_nancheck( 1, &tolb, 1 ) ) {
65  return -13;
66  }
67  }
68 #endif
69  /* Query optimal size for working array */
70  info = LAPACKE_dggsvp3_work( matrix_layout, jobu, jobv, jobq, m, p, n,
71  a, lda, b, ldb, tola, tolb, k, l, u, ldu,
72  v, ldv, q, ldq, iwork, tau, &work_query,
73  lwork );
74  if( info != 0 )
75  goto exit_level_0;
76  lwork = work_query;
77  /* Allocate memory for working array(s) */
78  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
79  if( iwork == NULL ) {
81  goto exit_level_0;
82  }
83  tau = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
84  if( tau == NULL ) {
86  goto exit_level_1;
87  }
88  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
89  if( work == NULL ) {
91  goto exit_level_2;
92  }
93  /* Call middle-level interface */
94  info = LAPACKE_dggsvp3_work( matrix_layout, jobu, jobv, jobq, m, p, n, a, lda,
95  b, ldb, tola, tolb, k, l, u, ldu, v, ldv, q,
96  ldq, iwork, tau, work, lwork );
97  /* Release memory and exit */
98  LAPACKE_free( work );
99 exit_level_2:
100  LAPACKE_free( tau );
101 exit_level_1:
102  LAPACKE_free( iwork );
103 exit_level_0:
104  if( info == LAPACK_WORK_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_dggsvp3", info );
106  }
107  return info;
108 }
#define lapack_int
Definition: lapack.h:83
#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_dggsvp3_work(int matrix_layout, char jobu, char jobv, char jobq, lapack_int m, lapack_int p, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, double tola, double tolb, lapack_int *k, lapack_int *l, double *u, lapack_int ldu, double *v, lapack_int ldv, double *q, lapack_int ldq, lapack_int *iwork, double *tau, double *work, lapack_int lwork)
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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