LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsyevd_work()

lapack_int LAPACKE_dsyevd_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  w,
double *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_dsyevd_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_dsyevd( &jobz, &uplo, &n, a, &lda, w, work, &lwork, iwork,
45  &liwork, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int lda_t = MAX(1,n);
51  double* a_t = NULL;
52  /* Check leading dimension(s) */
53  if( lda < n ) {
54  info = -6;
55  LAPACKE_xerbla( "LAPACKE_dsyevd_work", info );
56  return info;
57  }
58  /* Query optimal working array(s) size if requested */
59  if( liwork == -1 || lwork == -1 ) {
60  LAPACK_dsyevd( &jobz, &uplo, &n, a, &lda_t, w, work, &lwork, iwork,
61  &liwork, &info );
62  return (info < 0) ? (info - 1) : info;
63  }
64  /* Allocate memory for temporary array(s) */
65  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
66  if( a_t == NULL ) {
68  goto exit_level_0;
69  }
70  /* Transpose input matrices */
71  LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
72  /* Call LAPACK function and adjust info */
73  LAPACK_dsyevd( &jobz, &uplo, &n, a_t, &lda_t, w, work, &lwork, iwork,
74  &liwork, &info );
75  if( info < 0 ) {
76  info = info - 1;
77  }
78  /* Transpose output matrices */
79  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
80  /* Release memory and exit */
81  LAPACKE_free( a_t );
82 exit_level_0:
83  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
84  LAPACKE_xerbla( "LAPACKE_dsyevd_work", info );
85  }
86  } else {
87  info = -1;
88  LAPACKE_xerbla( "LAPACKE_dsyevd_work", info );
89  }
90  return info;
91 }
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 LAPACK_dsyevd(char *jobz, char *uplo, lapack_int *n, double *a, lapack_int *lda, double *w, double *work, lapack_int *lwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#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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