LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapack_int LAPACKE_dgtsv_work ( int  matrix_layout,
lapack_int  n,
lapack_int  nrhs,
double *  dl,
double *  d,
double *  du,
double *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_dgtsv_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dgtsv( &n, &nrhs, dl, d, du, b, &ldb, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int ldb_t = MAX(1,n);
49  double* b_t = NULL;
50  /* Check leading dimension(s) */
51  if( ldb < nrhs ) {
52  info = -8;
53  LAPACKE_xerbla( "LAPACKE_dgtsv_work", info );
54  return info;
55  }
56  /* Allocate memory for temporary array(s) */
57  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
58  if( b_t == NULL ) {
60  goto exit_level_0;
61  }
62  /* Transpose input matrices */
63  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
64  /* Call LAPACK function and adjust info */
65  LAPACK_dgtsv( &n, &nrhs, dl, d, du, b_t, &ldb_t, &info );
66  if( info < 0 ) {
67  info = info - 1;
68  }
69  /* Transpose output matrices */
70  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
71  /* Release memory and exit */
72  LAPACKE_free( b_t );
73 exit_level_0:
74  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
75  LAPACKE_xerbla( "LAPACKE_dgtsv_work", info );
76  }
77  } else {
78  info = -1;
79  LAPACKE_xerbla( "LAPACKE_dgtsv_work", info );
80  }
81  return info;
82 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
void LAPACK_dgtsv(lapack_int *n, lapack_int *nrhs, double *dl, double *d, double *du, double *b, lapack_int *ldb, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#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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