LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstevd_work()

lapack_int LAPACKE_dstevd_work ( int  matrix_layout,
char  jobz,
lapack_int  n,
double *  d,
double *  e,
double *  z,
lapack_int  ldz,
double *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 35 of file lapacke_dstevd_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dstevd( &jobz, &n, d, e, z, &ldz, work, &lwork, iwork, &liwork,
44  &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldz_t = MAX(1,n);
50  double* z_t = NULL;
51  /* Check leading dimension(s) */
52  if( ldz < n ) {
53  info = -7;
54  LAPACKE_xerbla( "LAPACKE_dstevd_work", info );
55  return info;
56  }
57  /* Query optimal working array(s) size if requested */
58  if( liwork == -1 || lwork == -1 ) {
59  LAPACK_dstevd( &jobz, &n, d, e, z, &ldz_t, work, &lwork, iwork,
60  &liwork, &info );
61  return (info < 0) ? (info - 1) : info;
62  }
63  /* Allocate memory for temporary array(s) */
64  if( LAPACKE_lsame( jobz, 'v' ) ) {
65  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
66  if( z_t == NULL ) {
68  goto exit_level_0;
69  }
70  }
71  /* Call LAPACK function and adjust info */
72  LAPACK_dstevd( &jobz, &n, d, e, z_t, &ldz_t, work, &lwork, iwork,
73  &liwork, &info );
74  if( info < 0 ) {
75  info = info - 1;
76  }
77  /* Transpose output matrices */
78  if( LAPACKE_lsame( jobz, 'v' ) ) {
79  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
80  }
81  /* Release memory and exit */
82  if( LAPACKE_lsame( jobz, 'v' ) ) {
83  LAPACKE_free( z_t );
84  }
85 exit_level_0:
86  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
87  LAPACKE_xerbla( "LAPACKE_dstevd_work", info );
88  }
89  } else {
90  info = -1;
91  LAPACKE_xerbla( "LAPACKE_dstevd_work", info );
92  }
93  return info;
94 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dstevd(...)
Definition: lapack.h:16578
#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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