LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbtrd_work()

lapack_int LAPACKE_dsbtrd_work ( int  matrix_layout,
char  vect,
char  uplo,
lapack_int  n,
lapack_int  kd,
double *  ab,
lapack_int  ldab,
double *  d,
double *  e,
double *  q,
lapack_int  ldq,
double *  work 
)

Definition at line 36 of file lapacke_dsbtrd_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_dsbtrd( &vect, &uplo, &n, &kd, ab, &ldab, d, e, q, &ldq, work,
45  &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldab_t = MAX(1,kd+1);
51  lapack_int ldq_t = MAX(1,n);
52  double* ab_t = NULL;
53  double* q_t = NULL;
54  /* Check leading dimension(s) */
55  if( ldab < n ) {
56  info = -7;
57  LAPACKE_xerbla( "LAPACKE_dsbtrd_work", info );
58  return info;
59  }
60  if( ldq < n ) {
61  info = -11;
62  LAPACKE_xerbla( "LAPACKE_dsbtrd_work", info );
63  return info;
64  }
65  /* Allocate memory for temporary array(s) */
66  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
67  if( ab_t == NULL ) {
69  goto exit_level_0;
70  }
71  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
72  q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
73  if( q_t == NULL ) {
75  goto exit_level_1;
76  }
77  }
78  /* Transpose input matrices */
79  LAPACKE_dsb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
80  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
81  LAPACKE_dge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
82  }
83  /* Call LAPACK function and adjust info */
84  LAPACK_dsbtrd( &vect, &uplo, &n, &kd, ab_t, &ldab_t, d, e, q_t, &ldq_t,
85  work, &info );
86  if( info < 0 ) {
87  info = info - 1;
88  }
89  /* Transpose output matrices */
90  LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
91  ldab );
92  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
93  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
94  }
95  /* Release memory and exit */
96  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
97  LAPACKE_free( q_t );
98  }
99 exit_level_1:
100  LAPACKE_free( ab_t );
101 exit_level_0:
102  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
103  LAPACKE_xerbla( "LAPACKE_dsbtrd_work", info );
104  }
105  } else {
106  info = -1;
107  LAPACKE_xerbla( "LAPACKE_dsbtrd_work", info );
108  }
109  return info;
110 }
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_dsb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACK_dsbtrd(char *vect, char *uplo, lapack_int *n, lapack_int *kd, double *ab, lapack_int *ldab, double *d, double *e, double *q, lapack_int *ldq, double *work, lapack_int *info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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