LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgbtrf_work()

lapack_int LAPACKE_dgbtrf_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
double *  ab,
lapack_int  ldab,
lapack_int ipiv 
)

Definition at line 36 of file lapacke_dgbtrf_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dgbtrf( &m, &n, &kl, &ku, ab, &ldab, ipiv, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int ldab_t = MAX(1,2*kl+ku+1);
49  double* ab_t = NULL;
50  /* Check leading dimension(s) */
51  if( ldab < n ) {
52  info = -7;
53  LAPACKE_xerbla( "LAPACKE_dgbtrf_work", info );
54  return info;
55  }
56  /* Allocate memory for temporary array(s) */
57  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
58  if( ab_t == NULL ) {
60  goto exit_level_0;
61  }
62  /* Transpose input matrices */
63  LAPACKE_dgb_trans( matrix_layout, m, n, kl, kl+ku, ab, ldab, ab_t,
64  ldab_t );
65  /* Call LAPACK function and adjust info */
66  LAPACK_dgbtrf( &m, &n, &kl, &ku, ab_t, &ldab_t, ipiv, &info );
67  if( info < 0 ) {
68  info = info - 1;
69  }
70  /* Transpose output matrices */
71  LAPACKE_dgb_trans( LAPACK_COL_MAJOR, m, n, kl, kl+ku, ab_t, ldab_t, ab,
72  ldab );
73  /* Release memory and exit */
74  LAPACKE_free( ab_t );
75 exit_level_0:
76  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
77  LAPACKE_xerbla( "LAPACKE_dgbtrf_work", info );
78  }
79  } else {
80  info = -1;
81  LAPACKE_xerbla( "LAPACKE_dgbtrf_work", info );
82  }
83  return info;
84 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
void LAPACKE_dgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
void LAPACK_dgbtrf(lapack_int *m, lapack_int *n, lapack_int *kl, lapack_int *ku, double *ab, lapack_int *ldab, lapack_int *ipiv, lapack_int *info)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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