LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dpbtrf_work()

lapack_int LAPACKE_dpbtrf_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  kd,
double *  ab,
lapack_int  ldab 
)

Definition at line 36 of file lapacke_dpbtrf_work.c.

38 {
39  lapack_int info = 0;
40  if( matrix_layout == LAPACK_COL_MAJOR ) {
41  /* Call LAPACK function and adjust info */
42  LAPACK_dpbtrf( &uplo, &n, &kd, ab, &ldab, &info );
43  if( info < 0 ) {
44  info = info - 1;
45  }
46  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47  lapack_int ldab_t = MAX(1,kd+1);
48  double* ab_t = NULL;
49  /* Check leading dimension(s) */
50  if( ldab < n ) {
51  info = -6;
52  LAPACKE_xerbla( "LAPACKE_dpbtrf_work", info );
53  return info;
54  }
55  /* Allocate memory for temporary array(s) */
56  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
57  if( ab_t == NULL ) {
59  goto exit_level_0;
60  }
61  /* Transpose input matrices */
62  LAPACKE_dpb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
63  /* Call LAPACK function and adjust info */
64  LAPACK_dpbtrf( &uplo, &n, &kd, ab_t, &ldab_t, &info );
65  if( info < 0 ) {
66  info = info - 1;
67  }
68  /* Transpose output matrices */
69  LAPACKE_dpb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
70  ldab );
71  /* Release memory and exit */
72  LAPACKE_free( ab_t );
73 exit_level_0:
74  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
75  LAPACKE_xerbla( "LAPACKE_dpbtrf_work", info );
76  }
77  } else {
78  info = -1;
79  LAPACKE_xerbla( "LAPACKE_dpbtrf_work", info );
80  }
81  return info;
82 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACK_dpbtrf(char *uplo, lapack_int *n, lapack_int *kd, double *ab, lapack_int *ldab, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACKE_dpb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#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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