LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgerfs()

lapack_int LAPACKE_dgerfs ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const double *  a,
lapack_int  lda,
const double *  af,
lapack_int  ldaf,
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_dgerfs.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_dgerfs", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
53  return -5;
54  }
55  if( LAPACKE_dge_nancheck( matrix_layout, n, n, af, ldaf ) ) {
56  return -7;
57  }
58  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
59  return -10;
60  }
61  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
62  return -12;
63  }
64 #endif
65  /* Allocate memory for working array(s) */
66  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
67  if( iwork == NULL ) {
69  goto exit_level_0;
70  }
71  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
72  if( work == NULL ) {
74  goto exit_level_1;
75  }
76  /* Call middle-level interface */
77  info = LAPACKE_dgerfs_work( matrix_layout, trans, n, nrhs, a, lda, af, ldaf,
78  ipiv, b, ldb, x, ldx, ferr, berr, work, iwork );
79  /* Release memory and exit */
80  LAPACKE_free( work );
81 exit_level_1:
82  LAPACKE_free( iwork );
83 exit_level_0:
84  if( info == LAPACK_WORK_MEMORY_ERROR ) {
85  LAPACKE_xerbla( "LAPACKE_dgerfs", info );
86  }
87  return info;
88 }
lapack_int LAPACKE_dgerfs_work(int matrix_layout, char trans, lapack_int n, lapack_int nrhs, const double *a, lapack_int lda, const double *af, lapack_int ldaf, 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
#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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