LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dptrfs_work()

lapack_int LAPACKE_dptrfs_work ( int  matrix_layout,
lapack_int  n,
lapack_int  nrhs,
const double *  d,
const double *  e,
const double *  df,
const double *  ef,
const double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  ferr,
double *  berr,
double *  work 
)

Definition at line 36 of file lapacke_dptrfs_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dptrfs( &n, &nrhs, d, e, df, ef, b, &ldb, x, &ldx, ferr, berr,
47  work, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldb_t = MAX(1,n);
53  lapack_int ldx_t = MAX(1,n);
54  double* b_t = NULL;
55  double* x_t = NULL;
56  /* Check leading dimension(s) */
57  if( ldb < nrhs ) {
58  info = -9;
59  LAPACKE_xerbla( "LAPACKE_dptrfs_work", info );
60  return info;
61  }
62  if( ldx < nrhs ) {
63  info = -11;
64  LAPACKE_xerbla( "LAPACKE_dptrfs_work", info );
65  return info;
66  }
67  /* Allocate memory for temporary array(s) */
68  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
69  if( b_t == NULL ) {
71  goto exit_level_0;
72  }
73  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
74  if( x_t == NULL ) {
76  goto exit_level_1;
77  }
78  /* Transpose input matrices */
79  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
80  LAPACKE_dge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
81  /* Call LAPACK function and adjust info */
82  LAPACK_dptrfs( &n, &nrhs, d, e, df, ef, b_t, &ldb_t, x_t, &ldx_t, ferr,
83  berr, work, &info );
84  if( info < 0 ) {
85  info = info - 1;
86  }
87  /* Transpose output matrices */
88  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
89  /* Release memory and exit */
90  LAPACKE_free( x_t );
91 exit_level_1:
92  LAPACKE_free( b_t );
93 exit_level_0:
94  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
95  LAPACKE_xerbla( "LAPACKE_dptrfs_work", info );
96  }
97  } else {
98  info = -1;
99  LAPACKE_xerbla( "LAPACKE_dptrfs_work", info );
100  }
101  return info;
102 }
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
#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
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACK_dptrfs(lapack_int *n, lapack_int *nrhs, const double *d, const double *e, const double *df, const double *ef, const double *b, lapack_int *ldb, double *x, lapack_int *ldx, double *ferr, double *berr, double *work, lapack_int *info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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