LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chegvd_work()

lapack_int LAPACKE_chegvd_work ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
lapack_complex_float b,
lapack_int  ldb,
float *  w,
lapack_complex_float work,
lapack_int  lwork,
float *  rwork,
lapack_int  lrwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_chegvd_work.c.

44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_chegvd( &itype, &jobz, &uplo, &n, a, &lda, b, &ldb, w, work,
49  &lwork, rwork, &lrwork, iwork, &liwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int lda_t = MAX(1,n);
55  lapack_int ldb_t = MAX(1,n);
56  lapack_complex_float* a_t = NULL;
57  lapack_complex_float* b_t = NULL;
58  /* Check leading dimension(s) */
59  if( lda < n ) {
60  info = -7;
61  LAPACKE_xerbla( "LAPACKE_chegvd_work", info );
62  return info;
63  }
64  if( ldb < n ) {
65  info = -9;
66  LAPACKE_xerbla( "LAPACKE_chegvd_work", info );
67  return info;
68  }
69  /* Query optimal working array(s) size if requested */
70  if( liwork == -1 || lrwork == -1 || lwork == -1 ) {
71  LAPACK_chegvd( &itype, &jobz, &uplo, &n, a, &lda_t, b, &ldb_t, w,
72  work, &lwork, rwork, &lrwork, iwork, &liwork,
73  &info );
74  return (info < 0) ? (info - 1) : info;
75  }
76  /* Allocate memory for temporary array(s) */
77  a_t = (lapack_complex_float*)
78  LAPACKE_malloc( sizeof(lapack_complex_float) * lda_t * MAX(1,n) );
79  if( a_t == NULL ) {
81  goto exit_level_0;
82  }
83  b_t = (lapack_complex_float*)
84  LAPACKE_malloc( sizeof(lapack_complex_float) * ldb_t * MAX(1,n) );
85  if( b_t == NULL ) {
87  goto exit_level_1;
88  }
89  /* Transpose input matrices */
90  LAPACKE_cge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
91  LAPACKE_cge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
92  /* Call LAPACK function and adjust info */
93  LAPACK_chegvd( &itype, &jobz, &uplo, &n, a_t, &lda_t, b_t, &ldb_t, w,
94  work, &lwork, rwork, &lrwork, iwork, &liwork, &info );
95  if( info < 0 ) {
96  info = info - 1;
97  }
98  /* Transpose output matrices */
99  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
100  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
101  /* Release memory and exit */
102  LAPACKE_free( b_t );
103 exit_level_1:
104  LAPACKE_free( a_t );
105 exit_level_0:
106  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
107  LAPACKE_xerbla( "LAPACKE_chegvd_work", info );
108  }
109  } else {
110  info = -1;
111  LAPACKE_xerbla( "LAPACKE_chegvd_work", info );
112  }
113  return info;
114 }
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
void LAPACK_chegvd(lapack_int *itype, char *jobz, char *uplo, lapack_int *n, lapack_complex_float *a, lapack_int *lda, lapack_complex_float *b, lapack_int *ldb, float *w, lapack_complex_float *work, lapack_int *lwork, float *rwork, lapack_int *lrwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
#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
#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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