LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgtrfs_work()

lapack_int LAPACKE_dgtrfs_work ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const double *  dl,
const double *  d,
const double *  du,
const double *  dlf,
const double *  df,
const double *  duf,
const double *  du2,
const lapack_int ipiv,
const double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  ferr,
double *  berr,
double *  work,
lapack_int iwork 
)

Definition at line 35 of file lapacke_dgtrfs_work.c.

44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_dgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv, b,
49  &ldb, x, &ldx, ferr, berr, work, iwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int ldb_t = MAX(1,n);
55  lapack_int ldx_t = MAX(1,n);
56  double* b_t = NULL;
57  double* x_t = NULL;
58  /* Check leading dimension(s) */
59  if( ldb < nrhs ) {
60  info = -14;
61  LAPACKE_xerbla( "LAPACKE_dgtrfs_work", info );
62  return info;
63  }
64  if( ldx < nrhs ) {
65  info = -16;
66  LAPACKE_xerbla( "LAPACKE_dgtrfs_work", info );
67  return info;
68  }
69  /* Allocate memory for temporary array(s) */
70  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
71  if( b_t == NULL ) {
73  goto exit_level_0;
74  }
75  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
76  if( x_t == NULL ) {
78  goto exit_level_1;
79  }
80  /* Transpose input matrices */
81  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
82  LAPACKE_dge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
83  /* Call LAPACK function and adjust info */
84  LAPACK_dgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv,
85  b_t, &ldb_t, x_t, &ldx_t, ferr, berr, work, iwork,
86  &info );
87  if( info < 0 ) {
88  info = info - 1;
89  }
90  /* Transpose output matrices */
91  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
92  /* Release memory and exit */
93  LAPACKE_free( x_t );
94 exit_level_1:
95  LAPACKE_free( b_t );
96 exit_level_0:
97  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
98  LAPACKE_xerbla( "LAPACKE_dgtrfs_work", info );
99  }
100  } else {
101  info = -1;
102  LAPACKE_xerbla( "LAPACKE_dgtrfs_work", info );
103  }
104  return info;
105 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dgtrfs(...)
Definition: lapack.h:5791
#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_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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