LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgbsv_work()

lapack_int LAPACKE_dgbsv_work ( int  matrix_layout,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
lapack_int  nrhs,
double *  ab,
lapack_int  ldab,
lapack_int ipiv,
double *  b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_dgbsv_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dgbsv( &n, &kl, &ku, &nrhs, ab, &ldab, ipiv, b, &ldb, &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  lapack_int ldb_t = MAX(1,n);
50  double* ab_t = NULL;
51  double* b_t = NULL;
52  /* Check leading dimension(s) */
53  if( ldab < n ) {
54  info = -7;
55  LAPACKE_xerbla( "LAPACKE_dgbsv_work", info );
56  return info;
57  }
58  if( ldb < nrhs ) {
59  info = -10;
60  LAPACKE_xerbla( "LAPACKE_dgbsv_work", info );
61  return info;
62  }
63  /* Allocate memory for temporary array(s) */
64  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
65  if( ab_t == NULL ) {
67  goto exit_level_0;
68  }
69  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
70  if( b_t == NULL ) {
72  goto exit_level_1;
73  }
74  /* Transpose input matrices */
75  LAPACKE_dgb_trans( matrix_layout, n, n, kl, kl+ku, ab, ldab, ab_t,
76  ldab_t );
77  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
78  /* Call LAPACK function and adjust info */
79  LAPACK_dgbsv( &n, &kl, &ku, &nrhs, ab_t, &ldab_t, ipiv, b_t, &ldb_t,
80  &info );
81  if( info < 0 ) {
82  info = info - 1;
83  }
84  /* Transpose output matrices */
85  LAPACKE_dgb_trans( LAPACK_COL_MAJOR, n, n, kl, kl+ku, ab_t, ldab_t, ab,
86  ldab );
87  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
88  /* Release memory and exit */
89  LAPACKE_free( b_t );
90 exit_level_1:
91  LAPACKE_free( ab_t );
92 exit_level_0:
93  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
94  LAPACKE_xerbla( "LAPACKE_dgbsv_work", info );
95  }
96  } else {
97  info = -1;
98  LAPACKE_xerbla( "LAPACKE_dgbsv_work", info );
99  }
100  return info;
101 }
void LAPACK_dgbsv(lapack_int const *n, lapack_int const *kl, lapack_int const *ku, lapack_int const *nrhs, double *AB, lapack_int const *ldab, lapack_int *ipiv, double *B, lapack_int const *ldb, lapack_int *info)
#define lapack_int
Definition: lapack.h:83
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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)
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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