LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgbrfs()

lapack_int LAPACKE_dgbrfs ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
lapack_int  nrhs,
const double *  ab,
lapack_int  ldab,
const double *  afb,
lapack_int  ldafb,
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_dgbrfs.c.

42 {
43  lapack_int info = 0;
44  lapack_int* iwork = NULL;
45  double* work = NULL;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_dgbrfs", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_dgb_nancheck( matrix_layout, n, n, kl, ku, ab, ldab ) ) {
54  return -7;
55  }
56  if( LAPACKE_dgb_nancheck( matrix_layout, n, n, kl, kl+ku, afb, ldafb ) ) {
57  return -9;
58  }
59  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
60  return -12;
61  }
62  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
63  return -14;
64  }
65  }
66 #endif
67  /* Allocate memory for working array(s) */
68  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
69  if( iwork == NULL ) {
71  goto exit_level_0;
72  }
73  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
74  if( work == NULL ) {
76  goto exit_level_1;
77  }
78  /* Call middle-level interface */
79  info = LAPACKE_dgbrfs_work( matrix_layout, trans, n, kl, ku, nrhs, ab, ldab,
80  afb, ldafb, ipiv, b, ldb, x, ldx, ferr, berr,
81  work, iwork );
82  /* Release memory and exit */
83  LAPACKE_free( work );
84 exit_level_1:
85  LAPACKE_free( iwork );
86 exit_level_0:
87  if( info == LAPACK_WORK_MEMORY_ERROR ) {
88  LAPACKE_xerbla( "LAPACKE_dgbrfs", info );
89  }
90  return info;
91 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
lapack_int LAPACKE_dgbrfs_work(int matrix_layout, char trans, lapack_int n, lapack_int kl, lapack_int ku, lapack_int nrhs, const double *ab, lapack_int ldab, const double *afb, lapack_int ldafb, 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 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_dgb_nancheck(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const double *ab, lapack_int ldab)
#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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