LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dptrfs()

lapack_int LAPACKE_dptrfs ( 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 
)

Definition at line 36 of file lapacke_dptrfs.c.

41 {
42  lapack_int info = 0;
43  double* work = NULL;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_dptrfs", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  if( LAPACKE_get_nancheck() ) {
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
52  return -8;
53  }
54  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
55  return -4;
56  }
57  if( LAPACKE_d_nancheck( n, df, 1 ) ) {
58  return -6;
59  }
60  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
61  return -5;
62  }
63  if( LAPACKE_d_nancheck( n-1, ef, 1 ) ) {
64  return -7;
65  }
66  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
67  return -10;
68  }
69  }
70 #endif
71  /* Allocate memory for working array(s) */
72  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
73  if( work == NULL ) {
75  goto exit_level_0;
76  }
77  /* Call middle-level interface */
78  info = LAPACKE_dptrfs_work( matrix_layout, n, nrhs, d, e, df, ef, b, ldb, x,
79  ldx, ferr, berr, work );
80  /* Release memory and exit */
81  LAPACKE_free( work );
82 exit_level_0:
83  if( info == LAPACK_WORK_MEMORY_ERROR ) {
84  LAPACKE_xerbla( "LAPACKE_dptrfs", info );
85  }
86  return info;
87 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
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)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
int LAPACKE_get_nancheck()
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