LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgtrfs()

lapack_int LAPACKE_dgtrfs ( 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 
)

Definition at line 36 of file lapacke_dgtrfs.c.

43 {
44  lapack_int info = 0;
45  lapack_int* iwork = NULL;
46  double* work = NULL;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_dgtrfs", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
55  return -13;
56  }
57  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
58  return -6;
59  }
60  if( LAPACKE_d_nancheck( n, df, 1 ) ) {
61  return -9;
62  }
63  if( LAPACKE_d_nancheck( n-1, dl, 1 ) ) {
64  return -5;
65  }
66  if( LAPACKE_d_nancheck( n-1, dlf, 1 ) ) {
67  return -8;
68  }
69  if( LAPACKE_d_nancheck( n-1, du, 1 ) ) {
70  return -7;
71  }
72  if( LAPACKE_d_nancheck( n-2, du2, 1 ) ) {
73  return -11;
74  }
75  if( LAPACKE_d_nancheck( n-1, duf, 1 ) ) {
76  return -10;
77  }
78  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
79  return -15;
80  }
81  }
82 #endif
83  /* Allocate memory for working array(s) */
84  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
85  if( iwork == NULL ) {
87  goto exit_level_0;
88  }
89  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
90  if( work == NULL ) {
92  goto exit_level_1;
93  }
94  /* Call middle-level interface */
95  info = LAPACKE_dgtrfs_work( matrix_layout, trans, n, nrhs, dl, d, du, dlf,
96  df, duf, du2, ipiv, b, ldb, x, ldx, ferr, berr,
97  work, iwork );
98  /* Release memory and exit */
99  LAPACKE_free( work );
100 exit_level_1:
101  LAPACKE_free( iwork );
102 exit_level_0:
103  if( info == LAPACK_WORK_MEMORY_ERROR ) {
104  LAPACKE_xerbla( "LAPACKE_dgtrfs", info );
105  }
106  return info;
107 }
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)
#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)
#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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