LAPACK  3.8.0
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 36 of file lapacke_dpbsv_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dpbsv( &uplo, &n, &kd, &nrhs, ab, &ldab, 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,kd+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_dpbsv_work", info );
56  return info;
57  }
58  if( ldb < nrhs ) {
59  info = -9;
60  LAPACKE_xerbla( "LAPACKE_dpbsv_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_dpb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
76  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
77  /* Call LAPACK function and adjust info */
78  LAPACK_dpbsv( &uplo, &n, &kd, &nrhs, ab_t, &ldab_t, b_t, &ldb_t,
79  &info );
80  if( info < 0 ) {
81  info = info - 1;
82  }
83  /* Transpose output matrices */
84  LAPACKE_dpb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
85  ldab );
86  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
87  /* Release memory and exit */
88  LAPACKE_free( b_t );
89 exit_level_1:
90  LAPACKE_free( ab_t );
91 exit_level_0:
92  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
93  LAPACKE_xerbla( "LAPACKE_dpbsv_work", info );
94  }
95  } else {
96  info = -1;
97  LAPACKE_xerbla( "LAPACKE_dpbsv_work", info );
98  }
99  return info;
100 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACK_dpbsv(char *uplo, lapack_int *n, lapack_int *kd, lapack_int *nrhs, double *ab, lapack_int *ldab, double *b, lapack_int *ldb, lapack_int *info)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
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)
#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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