LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dpbsv_work()

lapack_int LAPACKE_dpbsv_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  kd,
lapack_int  nrhs,
double *  ab,
lapack_int  ldab,
double *  b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_dpbsv_work.c.

38 {
39  lapack_int info = 0;
40  if( matrix_layout == LAPACK_COL_MAJOR ) {
41  /* Call LAPACK function and adjust info */
42  LAPACK_dpbsv( &uplo, &n, &kd, &nrhs, ab, &ldab, b, &ldb, &info );
43  if( info < 0 ) {
44  info = info - 1;
45  }
46  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47  lapack_int ldab_t = MAX(1,kd+1);
48  lapack_int ldb_t = MAX(1,n);
49  double* ab_t = NULL;
50  double* b_t = NULL;
51  /* Check leading dimension(s) */
52  if( ldab < n ) {
53  info = -7;
54  LAPACKE_xerbla( "LAPACKE_dpbsv_work", info );
55  return info;
56  }
57  if( ldb < nrhs ) {
58  info = -9;
59  LAPACKE_xerbla( "LAPACKE_dpbsv_work", info );
60  return info;
61  }
62  /* Allocate memory for temporary array(s) */
63  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
64  if( ab_t == NULL ) {
66  goto exit_level_0;
67  }
68  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
69  if( b_t == NULL ) {
71  goto exit_level_1;
72  }
73  /* Transpose input matrices */
74  LAPACKE_dpb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
75  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
76  /* Call LAPACK function and adjust info */
77  LAPACK_dpbsv( &uplo, &n, &kd, &nrhs, ab_t, &ldab_t, b_t, &ldb_t,
78  &info );
79  if( info < 0 ) {
80  info = info - 1;
81  }
82  /* Transpose output matrices */
83  LAPACKE_dpb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
84  ldab );
85  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
86  /* Release memory and exit */
87  LAPACKE_free( b_t );
88 exit_level_1:
89  LAPACKE_free( ab_t );
90 exit_level_0:
91  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_dpbsv_work", info );
93  }
94  } else {
95  info = -1;
96  LAPACKE_xerbla( "LAPACKE_dpbsv_work", info );
97  }
98  return info;
99 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dpbsv(...)
Definition: lapack.h:12145
#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_dpb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, 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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