LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtprfs_work()

lapack_int LAPACKE_dtprfs_work ( int  matrix_layout,
char  uplo,
char  trans,
char  diag,
lapack_int  n,
lapack_int  nrhs,
const double *  ap,
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_dtprfs_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dtprfs( &uplo, &trans, &diag, &n, &nrhs, ap, b, &ldb, x, &ldx,
47  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 ldb_t = MAX(1,n);
53  lapack_int ldx_t = MAX(1,n);
54  double* b_t = NULL;
55  double* x_t = NULL;
56  double* ap_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldb < nrhs ) {
59  info = -9;
60  LAPACKE_xerbla( "LAPACKE_dtprfs_work", info );
61  return info;
62  }
63  if( ldx < nrhs ) {
64  info = -11;
65  LAPACKE_xerbla( "LAPACKE_dtprfs_work", info );
66  return info;
67  }
68  /* Allocate memory for temporary array(s) */
69  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
70  if( b_t == NULL ) {
72  goto exit_level_0;
73  }
74  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
75  if( x_t == NULL ) {
77  goto exit_level_1;
78  }
79  ap_t = (double*)
80  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
81  if( ap_t == NULL ) {
83  goto exit_level_2;
84  }
85  /* Transpose input matrices */
86  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
87  LAPACKE_dge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
88  LAPACKE_dtp_trans( matrix_layout, uplo, diag, n, ap, ap_t );
89  /* Call LAPACK function and adjust info */
90  LAPACK_dtprfs( &uplo, &trans, &diag, &n, &nrhs, ap_t, b_t, &ldb_t, x_t,
91  &ldx_t, ferr, berr, work, iwork, &info );
92  if( info < 0 ) {
93  info = info - 1;
94  }
95  /* Release memory and exit */
96  LAPACKE_free( ap_t );
97 exit_level_2:
98  LAPACKE_free( x_t );
99 exit_level_1:
100  LAPACKE_free( b_t );
101 exit_level_0:
102  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
103  LAPACKE_xerbla( "LAPACKE_dtprfs_work", info );
104  }
105  } else {
106  info = -1;
107  LAPACKE_xerbla( "LAPACKE_dtprfs_work", info );
108  }
109  return info;
110 }
void LAPACK_dtprfs(char *uplo, char *trans, char *diag, lapack_int *n, lapack_int *nrhs, const double *ap, const double *b, lapack_int *ldb, const double *x, lapack_int *ldx, double *ferr, double *berr, double *work, lapack_int *iwork, lapack_int *info)
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
#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_dtp_trans(int matrix_layout, char uplo, char diag, lapack_int n, const double *in, double *out)
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