LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapack_int LAPACKE_dpftrs_work ( int  matrix_layout,
char  transr,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const double *  a,
double *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_dpftrs_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dpftrs( &transr, &uplo, &n, &nrhs, a, b, &ldb, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int ldb_t = MAX(1,n);
49  double* b_t = NULL;
50  double* a_t = NULL;
51  /* Check leading dimension(s) */
52  if( ldb < nrhs ) {
53  info = -8;
54  LAPACKE_xerbla( "LAPACKE_dpftrs_work", info );
55  return info;
56  }
57  /* Allocate memory for temporary array(s) */
58  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
59  if( b_t == NULL ) {
61  goto exit_level_0;
62  }
63  a_t = (double*)
64  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
65  if( a_t == NULL ) {
67  goto exit_level_1;
68  }
69  /* Transpose input matrices */
70  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
71  LAPACKE_dpf_trans( matrix_layout, transr, uplo, n, a, a_t );
72  /* Call LAPACK function and adjust info */
73  LAPACK_dpftrs( &transr, &uplo, &n, &nrhs, a_t, b_t, &ldb_t, &info );
74  if( info < 0 ) {
75  info = info - 1;
76  }
77  /* Transpose output matrices */
78  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
79  /* Release memory and exit */
80  LAPACKE_free( a_t );
81 exit_level_1:
82  LAPACKE_free( b_t );
83 exit_level_0:
84  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
85  LAPACKE_xerbla( "LAPACKE_dpftrs_work", info );
86  }
87  } else {
88  info = -1;
89  LAPACKE_xerbla( "LAPACKE_dpftrs_work", info );
90  }
91  return info;
92 }
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
void LAPACK_dpftrs(char *transr, char *uplo, lapack_int *n, lapack_int *nrhs, const double *a, double *b, lapack_int *ldb, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#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_dpf_trans(int matrix_layout, char transr, char uplo, lapack_int n, const double *in, double *out)

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