LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsyevd_2stage_work()

lapack_int LAPACKE_dsyevd_2stage_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 35 of file lapacke_dsyevd_2stage_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dsyevd_2stage( &jobz, &uplo, &n, a, &lda, w, work, &lwork, iwork,
44  &liwork, &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int lda_t = MAX(1,n);
50  double* a_t = NULL;
51  /* Check leading dimension(s) */
52  if( lda < n ) {
53  info = -6;
54  LAPACKE_xerbla( "LAPACKE_dsyevd_2stage_work", info );
55  return info;
56  }
57  /* Query optimal working array(s) size if requested */
58  if( liwork == -1 || lwork == -1 ) {
59  LAPACK_dsyevd_2stage( &jobz, &uplo, &n, a, &lda_t, w, work, &lwork, iwork,
60  &liwork, &info );
61  return (info < 0) ? (info - 1) : info;
62  }
63  /* Allocate memory for temporary array(s) */
64  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
65  if( a_t == NULL ) {
67  goto exit_level_0;
68  }
69  /* Transpose input matrices */
70  LAPACKE_dsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
71  /* Call LAPACK function and adjust info */
72  LAPACK_dsyevd_2stage( &jobz, &uplo, &n, a_t, &lda_t, w, work, &lwork, iwork,
73  &liwork, &info );
74  if( info < 0 ) {
75  info = info - 1;
76  }
77  /* Transpose output matrices */
78  if ( jobz == 'V' || jobz == 'v' ) {
79  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
80  } else {
81  LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
82  }
83  /* Release memory and exit */
84  LAPACKE_free( a_t );
85 exit_level_0:
86  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
87  LAPACKE_xerbla( "LAPACKE_dsyevd_2stage_work", info );
88  }
89  } else {
90  info = -1;
91  LAPACKE_xerbla( "LAPACKE_dsyevd_2stage_work", info );
92  }
93  return info;
94 }
#define LAPACK_dsyevd_2stage(...)
Definition: lapack.h:17131
#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
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)
void LAPACKE_dsy_trans(int matrix_layout, char uplo, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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