LAPACK  3.9.1
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 35 of file lapacke_cheev_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_cheev( &jobz, &uplo, &n, a, &lda, w, work, &lwork, rwork,
45  &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  lapack_complex_float* a_t = NULL;
52  /* Check leading dimension(s) */
53  if( lda < n ) {
54  info = -6;
55  LAPACKE_xerbla( "LAPACKE_cheev_work", info );
56  return info;
57  }
58  /* Query optimal working array(s) size if requested */
59  if( lwork == -1 ) {
60  LAPACK_cheev( &jobz, &uplo, &n, a, &lda_t, w, work, &lwork, rwork,
61  &info );
62  return (info < 0) ? (info - 1) : info;
63  }
64  /* Allocate memory for temporary array(s) */
65  a_t = (lapack_complex_float*)
66  LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
67  if( a_t == NULL ) {
69  goto exit_level_0;
70  }
71  /* Transpose input matrices */
72  LAPACKE_che_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
73  /* Call LAPACK function and adjust info */
74  LAPACK_cheev( &jobz, &uplo, &n, a_t, &lda_t, w, work, &lwork, rwork,
75  &info );
76  if( info < 0 ) {
77  info = info - 1;
78  }
79  /* Transpose output matrices */
80  if ( jobz == 'V') {
81  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
82  } else {
83  LAPACKE_che_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
84  }
85  /* Release memory and exit */
86  LAPACKE_free( a_t );
87 exit_level_0:
88  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
89  LAPACKE_xerbla( "LAPACKE_cheev_work", info );
90  }
91  } else {
92  info = -1;
93  LAPACKE_xerbla( "LAPACKE_cheev_work", info );
94  }
95  return info;
96 }
void LAPACK_cheev(char const *jobz, char const *uplo, lapack_int const *n, lapack_complex_float *A, lapack_int const *lda, float *W, lapack_complex_float *work, lapack_int const *lwork, float *rwork, lapack_int *info)
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#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)
void LAPACKE_che_trans(int matrix_layout, char uplo, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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)
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