LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtrrfs()

lapack_int LAPACKE_dtrrfs ( int  matrix_layout,
char  uplo,
char  trans,
char  diag,
lapack_int  n,
lapack_int  nrhs,
const double *  a,
lapack_int  lda,
const double *  b,
lapack_int  ldb,
const double *  x,
lapack_int  ldx,
double *  ferr,
double *  berr 
)

Definition at line 36 of file lapacke_dtrrfs.c.

41 {
42  lapack_int info = 0;
43  lapack_int* iwork = NULL;
44  double* work = NULL;
45  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46  LAPACKE_xerbla( "LAPACKE_dtrrfs", -1 );
47  return -1;
48  }
49 #ifndef LAPACK_DISABLE_NAN_CHECK
50  if( LAPACKE_get_nancheck() ) {
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_dtr_nancheck( matrix_layout, uplo, diag, n, a, lda ) ) {
53  return -7;
54  }
55  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
56  return -9;
57  }
58  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
59  return -11;
60  }
61  }
62 #endif
63  /* Allocate memory for working array(s) */
64  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
65  if( iwork == NULL ) {
67  goto exit_level_0;
68  }
69  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
70  if( work == NULL ) {
72  goto exit_level_1;
73  }
74  /* Call middle-level interface */
75  info = LAPACKE_dtrrfs_work( matrix_layout, uplo, trans, diag, n, nrhs, a,
76  lda, b, ldb, x, ldx, ferr, berr, work, iwork );
77  /* Release memory and exit */
78  LAPACKE_free( work );
79 exit_level_1:
80  LAPACKE_free( iwork );
81 exit_level_0:
82  if( info == LAPACK_WORK_MEMORY_ERROR ) {
83  LAPACKE_xerbla( "LAPACKE_dtrrfs", info );
84  }
85  return info;
86 }
lapack_int LAPACKE_dtrrfs_work(int matrix_layout, char uplo, char trans, char diag, lapack_int n, lapack_int nrhs, const double *a, lapack_int lda, const double *b, lapack_int ldb, const 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
lapack_logical LAPACKE_dtr_nancheck(int matrix_layout, char uplo, char diag, lapack_int n, const double *a, lapack_int lda)
#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
int LAPACKE_get_nancheck()
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