LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsteqr_work()

lapack_int LAPACKE_dsteqr_work ( int  matrix_layout,
char  compz,
lapack_int  n,
double *  d,
double *  e,
double *  z,
lapack_int  ldz,
double *  work 
)

Definition at line 35 of file lapacke_dsteqr_work.c.

38 {
39  lapack_int info = 0;
40  if( matrix_layout == LAPACK_COL_MAJOR ) {
41  /* Call LAPACK function and adjust info */
42  LAPACK_dsteqr( &compz, &n, d, e, z, &ldz, work, &info );
43  if( info < 0 ) {
44  info = info - 1;
45  }
46  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47  lapack_int ldz_t = MAX(1,n);
48  double* z_t = NULL;
49  /* Check leading dimension(s) */
50  if( ldz < n ) {
51  info = -7;
52  LAPACKE_xerbla( "LAPACKE_dsteqr_work", info );
53  return info;
54  }
55  /* Allocate memory for temporary array(s) */
56  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
57  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
58  if( z_t == NULL ) {
60  goto exit_level_0;
61  }
62  }
63  /* Transpose input matrices */
64  if( LAPACKE_lsame( compz, 'v' ) ) {
65  LAPACKE_dge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
66  }
67  /* Call LAPACK function and adjust info */
68  LAPACK_dsteqr( &compz, &n, d, e, z_t, &ldz_t, work, &info );
69  if( info < 0 ) {
70  info = info - 1;
71  }
72  /* Transpose output matrices */
73  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
74  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
75  }
76  /* Release memory and exit */
77  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
78  LAPACKE_free( z_t );
79  }
80 exit_level_0:
81  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
82  LAPACKE_xerbla( "LAPACKE_dsteqr_work", info );
83  }
84  } else {
85  info = -1;
86  LAPACKE_xerbla( "LAPACKE_dsteqr_work", info );
87  }
88  return info;
89 }
#define LAPACK_dsteqr(...)
Definition: lapack.h:16468
#define lapack_int
Definition: lapack.h:83
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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