LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cheevd_2stage_work()

lapack_int LAPACKE_cheevd_2stage_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,
lapack_int  lrwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 35 of file lapacke_cheevd_2stage_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_cheevd_2stage( &jobz, &uplo, &n, a, &lda, w, work, &lwork, rwork,
46  &lrwork, iwork, &liwork, &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_cheevd_2stage_work", info );
57  return info;
58  }
59  /* Query optimal working array(s) size if requested */
60  if( liwork == -1 || lrwork == -1 || lwork == -1 ) {
61  LAPACK_cheevd_2stage( &jobz, &uplo, &n, a, &lda_t, w, work, &lwork, rwork,
62  &lrwork, iwork, &liwork, &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_che_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
74  /* Call LAPACK function and adjust info */
75  LAPACK_cheevd_2stage( &jobz, &uplo, &n, a_t, &lda_t, w, work, &lwork, rwork,
76  &lrwork, iwork, &liwork, &info );
77  if( info < 0 ) {
78  info = info - 1;
79  }
80  /* Transpose output matrices */
81  if ( jobz == 'V' || jobz == 'v' ) {
82  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
83  } else {
84  LAPACKE_che_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
85  }
86  /* Release memory and exit */
87  LAPACKE_free( a_t );
88 exit_level_0:
89  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
90  LAPACKE_xerbla( "LAPACKE_cheevd_2stage_work", info );
91  }
92  } else {
93  info = -1;
94  LAPACKE_xerbla( "LAPACKE_cheevd_2stage_work", info );
95  }
96  return info;
97 }
#define LAPACK_cheevd_2stage(...)
Definition: lapack.h:6851
#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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