LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dpprfs_work()

lapack_int LAPACKE_dpprfs_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const double *  ap,
const double *  afp,
const double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  ferr,
double *  berr,
double *  work,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dpprfs_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dpprfs( &uplo, &n, &nrhs, ap, afp, b, &ldb, x, &ldx, ferr, berr,
47  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  double* afp_t = NULL;
58  /* Check leading dimension(s) */
59  if( ldb < nrhs ) {
60  info = -8;
61  LAPACKE_xerbla( "LAPACKE_dpprfs_work", info );
62  return info;
63  }
64  if( ldx < nrhs ) {
65  info = -10;
66  LAPACKE_xerbla( "LAPACKE_dpprfs_work", info );
67  return info;
68  }
69  /* Allocate memory for temporary array(s) */
70  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
71  if( b_t == NULL ) {
73  goto exit_level_0;
74  }
75  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
76  if( x_t == NULL ) {
78  goto exit_level_1;
79  }
80  ap_t = (double*)
81  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
82  if( ap_t == NULL ) {
84  goto exit_level_2;
85  }
86  afp_t = (double*)
87  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
88  if( afp_t == NULL ) {
90  goto exit_level_3;
91  }
92  /* Transpose input matrices */
93  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
94  LAPACKE_dge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
95  LAPACKE_dpp_trans( matrix_layout, uplo, n, ap, ap_t );
96  LAPACKE_dpp_trans( matrix_layout, uplo, n, afp, afp_t );
97  /* Call LAPACK function and adjust info */
98  LAPACK_dpprfs( &uplo, &n, &nrhs, ap_t, afp_t, b_t, &ldb_t, x_t, &ldx_t,
99  ferr, berr, work, iwork, &info );
100  if( info < 0 ) {
101  info = info - 1;
102  }
103  /* Transpose output matrices */
104  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
105  /* Release memory and exit */
106  LAPACKE_free( afp_t );
107 exit_level_3:
108  LAPACKE_free( ap_t );
109 exit_level_2:
110  LAPACKE_free( x_t );
111 exit_level_1:
112  LAPACKE_free( b_t );
113 exit_level_0:
114  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
115  LAPACKE_xerbla( "LAPACKE_dpprfs_work", info );
116  }
117  } else {
118  info = -1;
119  LAPACKE_xerbla( "LAPACKE_dpprfs_work", info );
120  }
121  return info;
122 }
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_dpprfs(char *uplo, lapack_int *n, lapack_int *nrhs, const double *ap, const double *afp, const double *b, lapack_int *ldb, double *x, lapack_int *ldx, double *ferr, double *berr, double *work, lapack_int *iwork, lapack_int *info)
void LAPACKE_dpp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#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
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