LAPACK  3.7.1 LAPACK: Linear Algebra PACKage

## ◆ LAPACKE_dtpttr_work()

 lapack_int LAPACKE_dtpttr_work ( int matrix_layout, char uplo, lapack_int n, const double * ap, double * a, lapack_int lda )

Definition at line 36 of file lapacke_dtpttr_work.c.

38 {
39  lapack_int info = 0;
40  if( matrix_layout == LAPACK_COL_MAJOR ) {
41  /* Call LAPACK function and adjust info */
42  LAPACK_dtpttr( &uplo, &n, ap, a, &lda, &info );
43  if( info < 0 ) {
44  info = info - 1;
45  }
46  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47  lapack_int lda_t = MAX(1,n);
48  double* a_t = NULL;
49  double* ap_t = NULL;
50  /* Check leading dimension(s) */
51  if( lda < n ) {
52  info = -6;
53  LAPACKE_xerbla( "LAPACKE_dtpttr_work", info );
54  return info;
55  }
56  /* Allocate memory for temporary array(s) */
57  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
58  if( a_t == NULL ) {
60  goto exit_level_0;
61  }
62  ap_t = (double*)
63  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
64  if( ap_t == NULL ) {
66  goto exit_level_1;
67  }
68  /* Transpose input matrices */
69  LAPACKE_dpp_trans( matrix_layout, uplo, n, ap, ap_t );
70  /* Call LAPACK function and adjust info */
71  LAPACK_dtpttr( &uplo, &n, ap_t, a_t, &lda_t, &info );
72  if( info < 0 ) {
73  info = info - 1;
74  }
75  /* Transpose output matrices */
76  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
77  /* Release memory and exit */
78  LAPACKE_free( ap_t );
79 exit_level_1:
80  LAPACKE_free( a_t );
81 exit_level_0:
82  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
83  LAPACKE_xerbla( "LAPACKE_dtpttr_work", info );
84  }
85  } else {
86  info = -1;
87  LAPACKE_xerbla( "LAPACKE_dtpttr_work", info );
88  }
89  return info;
90 }
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 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
void LAPACK_dtpttr(char *uplo, lapack_int *n, const double *ap, double *a, lapack_int *lda, lapack_int *info)
#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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