LAPACK  3.7.1
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  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
51  return -8;
52  }
53  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
54  return -4;
55  }
56  if( LAPACKE_d_nancheck( n, df, 1 ) ) {
57  return -6;
58  }
59  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
60  return -5;
61  }
62  if( LAPACKE_d_nancheck( n-1, ef, 1 ) ) {
63  return -7;
64  }
65  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
66  return -10;
67  }
68 #endif
69  /* Allocate memory for working array(s) */
70  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
71  if( work == NULL ) {
73  goto exit_level_0;
74  }
75  /* Call middle-level interface */
76  info = LAPACKE_dptrfs_work( matrix_layout, n, nrhs, d, e, df, ef, b, ldb, x,
77  ldx, ferr, berr, work );
78  /* Release memory and exit */
79  LAPACKE_free( work );
80 exit_level_0:
81  if( info == LAPACK_WORK_MEMORY_ERROR ) {
82  LAPACKE_xerbla( "LAPACKE_dptrfs", info );
83  }
84  return info;
85 }
#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
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