LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtrrfs_work()

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 
)

Definition at line 36 of file lapacke_dtrrfs_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dtrrfs( &uplo, &trans, &diag, &n, &nrhs, a, &lda, b, &ldb, x,
47  &ldx, ferr, berr, work, iwork, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int lda_t = MAX(1,n);
53  lapack_int ldb_t = MAX(1,n);
54  lapack_int ldx_t = MAX(1,n);
55  double* a_t = NULL;
56  double* b_t = NULL;
57  double* x_t = NULL;
58  /* Check leading dimension(s) */
59  if( lda < n ) {
60  info = -8;
61  LAPACKE_xerbla( "LAPACKE_dtrrfs_work", info );
62  return info;
63  }
64  if( ldb < nrhs ) {
65  info = -10;
66  LAPACKE_xerbla( "LAPACKE_dtrrfs_work", info );
67  return info;
68  }
69  if( ldx < nrhs ) {
70  info = -12;
71  LAPACKE_xerbla( "LAPACKE_dtrrfs_work", info );
72  return info;
73  }
74  /* Allocate memory for temporary array(s) */
75  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
76  if( a_t == NULL ) {
78  goto exit_level_0;
79  }
80  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
81  if( b_t == NULL ) {
83  goto exit_level_1;
84  }
85  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
86  if( x_t == NULL ) {
88  goto exit_level_2;
89  }
90  /* Transpose input matrices */
91  LAPACKE_dtr_trans( matrix_layout, uplo, diag, n, a, lda, a_t, lda_t );
92  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
93  LAPACKE_dge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
94  /* Call LAPACK function and adjust info */
95  LAPACK_dtrrfs( &uplo, &trans, &diag, &n, &nrhs, a_t, &lda_t, b_t,
96  &ldb_t, x_t, &ldx_t, ferr, berr, work, iwork, &info );
97  if( info < 0 ) {
98  info = info - 1;
99  }
100  /* Release memory and exit */
101  LAPACKE_free( x_t );
102 exit_level_2:
103  LAPACKE_free( b_t );
104 exit_level_1:
105  LAPACKE_free( a_t );
106 exit_level_0:
107  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
108  LAPACKE_xerbla( "LAPACKE_dtrrfs_work", info );
109  }
110  } else {
111  info = -1;
112  LAPACKE_xerbla( "LAPACKE_dtrrfs_work", info );
113  }
114  return info;
115 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACK_dtrrfs(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, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
void LAPACKE_dtr_trans(int matrix_layout, char uplo, char diag, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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