LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cheev_work()

lapack_int LAPACKE_cheev_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  w,
lapack_complex_float work,
lapack_int  lwork,
float *  rwork 
)

Definition at line 36 of file lapacke_cheev_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_cheev( &jobz, &uplo, &n, a, &lda, w, work, &lwork, rwork,
46  &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int lda_t = MAX(1,n);
52  lapack_complex_float* a_t = NULL;
53  /* Check leading dimension(s) */
54  if( lda < n ) {
55  info = -6;
56  LAPACKE_xerbla( "LAPACKE_cheev_work", info );
57  return info;
58  }
59  /* Query optimal working array(s) size if requested */
60  if( lwork == -1 ) {
61  LAPACK_cheev( &jobz, &uplo, &n, a, &lda_t, w, work, &lwork, rwork,
62  &info );
63  return (info < 0) ? (info - 1) : info;
64  }
65  /* Allocate memory for temporary array(s) */
66  a_t = (lapack_complex_float*)
67  LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
68  if( a_t == NULL ) {
70  goto exit_level_0;
71  }
72  /* Transpose input matrices */
73  LAPACKE_cge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
74  /* Call LAPACK function and adjust info */
75  LAPACK_cheev( &jobz, &uplo, &n, a_t, &lda_t, w, work, &lwork, rwork,
76  &info );
77  if( info < 0 ) {
78  info = info - 1;
79  }
80  /* Transpose output matrices */
81  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
82  /* Release memory and exit */
83  LAPACKE_free( a_t );
84 exit_level_0:
85  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
86  LAPACKE_xerbla( "LAPACKE_cheev_work", info );
87  }
88  } else {
89  info = -1;
90  LAPACKE_xerbla( "LAPACKE_cheev_work", info );
91  }
92  return info;
93 }
void LAPACKE_cge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_cheev(char *jobz, char *uplo, lapack_int *n, lapack_complex_float *a, lapack_int *lda, float *w, lapack_complex_float *work, lapack_int *lwork, float *rwork, lapack_int *info)
#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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