LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstev_work()

lapack_int LAPACKE_dstev_work ( int  matrix_layout,
char  jobz,
lapack_int  n,
double *  d,
double *  e,
double *  z,
lapack_int  ldz,
double *  work 
)

Definition at line 36 of file lapacke_dstev_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dstev( &jobz, &n, d, e, z, &ldz, work, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int ldz_t = MAX(1,n);
49  double* z_t = NULL;
50  /* Check leading dimension(s) */
51  if( ldz < n ) {
52  info = -7;
53  LAPACKE_xerbla( "LAPACKE_dstev_work", info );
54  return info;
55  }
56  /* Allocate memory for temporary array(s) */
57  if( LAPACKE_lsame( jobz, 'v' ) ) {
58  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
59  if( z_t == NULL ) {
61  goto exit_level_0;
62  }
63  }
64  /* Call LAPACK function and adjust info */
65  LAPACK_dstev( &jobz, &n, d, e, z_t, &ldz_t, work, &info );
66  if( info < 0 ) {
67  info = info - 1;
68  }
69  /* Transpose output matrices */
70  if( LAPACKE_lsame( jobz, 'v' ) ) {
71  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
72  }
73  /* Release memory and exit */
74  if( LAPACKE_lsame( jobz, 'v' ) ) {
75  LAPACKE_free( z_t );
76  }
77 exit_level_0:
78  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
79  LAPACKE_xerbla( "LAPACKE_dstev_work", info );
80  }
81  } else {
82  info = -1;
83  LAPACKE_xerbla( "LAPACKE_dstev_work", info );
84  }
85  return info;
86 }
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
#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)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
void LAPACK_dstev(char *jobz, lapack_int *n, double *d, double *e, double *z, lapack_int *ldz, double *work, lapack_int *info)
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