LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dopgtr_work()

lapack_int LAPACKE_dopgtr_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
const double *  ap,
const double *  tau,
double *  q,
lapack_int  ldq,
double *  work 
)

Definition at line 36 of file lapacke_dopgtr_work.c.

39 {
40  lapack_int info = 0;
41  lapack_int ldq_t;
42  double *q_t = NULL, *ap_t = NULL;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dopgtr( &uplo, &n, ap, tau, q, &ldq, work, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  ldq_t = MAX(1,n);
51  /* Check leading dimension(s) */
52  if( ldq < n ) {
53  info = -7;
54  LAPACKE_xerbla( "LAPACKE_dopgtr_work", info );
55  return info;
56  }
57  /* Allocate memory for temporary array(s) */
58  q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
59  if( q_t == NULL ) {
61  goto exit_level_0;
62  }
63  ap_t = (double*)
64  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
65  if( ap_t == NULL ) {
67  goto exit_level_1;
68  }
69  /* Transpose input matrices */
70  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
71  /* Call LAPACK function and adjust info */
72  LAPACK_dopgtr( &uplo, &n, ap_t, tau, q_t, &ldq_t, work, &info );
73  if( info < 0 ) {
74  info = info - 1;
75  }
76  /* Transpose output matrices */
77  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
78  /* Release memory and exit */
79  LAPACKE_free( ap_t );
80 exit_level_1:
81  LAPACKE_free( q_t );
82 exit_level_0:
83  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
84  LAPACKE_xerbla( "LAPACKE_dopgtr_work", info );
85  }
86  } else {
87  info = -1;
88  LAPACKE_xerbla( "LAPACKE_dopgtr_work", info );
89  }
90  return info;
91 }
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_dopgtr(char *uplo, lapack_int *n, const double *ap, const double *tau, double *q, lapack_int *ldq, double *work, 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
void LAPACKE_dsp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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